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Population ecology is the study of these and othe...<br />Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has a rich development and a great study of population growth, regulation, and dynamics, or demography. Human population growth is an important model for population ecologists, and is one of the most important environmental issues of the twenty-first century. But all populations, from disease organisms to wild-harvested fish stocks and forest trees to the species in a series to laboratory fruit files and paramecia, have been the subject of basic and applied population biology.<br /><br />An organism’s life history is a record of major events relating to its growth, development, reproduction, and survival. Life histories vary tremendously from one species to the next. <br /><br />The study of population ecology includes understanding, explaining, and predicting species distributions. Why do species inhabit particular areas, and how are they prevented from establishing beyond their range limits? These questions have become popular in the last decade or so in response to concerns about climate change.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-55863956591774045012015-05-07T12:01:27.845-05:002015-05-07T12:01:27.845-05:00Mary H hr 5
Food webs and food chains
A food cha...Mary H hr 5 <br />Food webs and food chains <br />A food chain is the sequence of who eats whom in a biological community or an ecosystem to obtain nutrition and survive. A food chain starts with the primary energy source, usually the sun. Or boiling vent chambers If under water. The next link in the chain is a producer (grass), an organism that make its own food from the primary energy source (the sun) and chemosynthetic bacteria that make their food energy from chemicals in hydrothermal vents under water. These are called primary producers or autotrophs. The chain goes on and on with producer being eaten by primary consumers . The primary being eaten by secondary consumers and secondary eaten by tertiary consumer. Grass ---> cricket ---> mouse ---> owl.<br /> A food web is the totality of interacting food chains in an ecological community. With a food web everything in the ecosystem can survive but if one organism is taken out the whole food web is affected. Let's say we have a food web with grass deer and wolves. if the deer die out the grass and weeds will go tall and spread where the wolves would slowly starve to death. Without the deer the whole ecosystem would be out of wack.<br /> Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-34025819251849715522015-05-05T16:51:29.716-05:002015-05-05T16:51:29.716-05:00Mitchell,R, P1
In chapter 13 we learned about Gene...Mitchell,R, P1<br />In chapter 13 we learned about Genetic Engineering. Genetic engineering is the process of manually adding new DNA to an organism. The goal is to add one or more new traits that are not already found in that organism. This is mainly used for food purposes or for giving pets better genes.<br /><br />For example, if you want to be able to get bigger and fatter cows, you can add certain genes into a cell, the cell will replicate and reproduce, making more cells, therefore giving the cow and the cows' offspring the same cell hence genes. You can also breed animals. Breeding is the reproduction that is producing of offspring, usually animals or plants. Breeding can allow to combine different traits from different breeds of animals and combine them to create an animal with similar traits of both the animals. You could combine 2 dogs, a bloodhound and a beagle, that is fast and has a good sense of smell, great for hunting.<br /><br />This unit has helped me better understand genetics and how all these new breeds of animals have come about. It is very interesting how these new breed of animals are made and is a very delicate process. Hopefully someday humans will be able to take genetic engineering further.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-83323531872670840122015-04-29T21:21:34.641-05:002015-04-29T21:21:34.641-05:00Jon S, Hour 2
Selective breeding is an interestin...Jon S, Hour 2 <br />Selective breeding is an interesting thing we learned about this year. Selective breeding is the process by which humans breed other animals and plants for particular traits. Typically, strains that are selectively bred are domesticated, and the breeding is normally done by a professional breeder. The offspring of two purebred animals of different breeds are called crossbreeds. Almost all animals can be selectively bred. <br /><br />There are two types of selective breeding, the "Breeder's approach", and "controlled selective breeding." In animal breeding, inbreeding, linebreeding, and crossbreeding are techniques that are utilized by breeders. Similar methods are used in plant breeding. Purebreds are animals with specifically one breed in them. Purebred breeding is supposed to establish and maintain traits, that animals will pass on to the next generation. A breeding stock is a group of animals used for the purpose of planned breeding. <br /><br />Selective breeding of both plants and animals have been dated back to prehistoric times. Wheat, rice, and dogs are three species that are much different that their originals because of selective breeding. Romans practiced selective breeding. Selective breeding was established as a scientific practice by Robert Bakewell during the British Agricultural Revolution in the 18th century. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-42491795188467676132015-04-29T20:36:48.070-05:002015-04-29T20:36:48.070-05:00Brittan B, Hour 3
The ecosystem is a complex netw...Brittan B, Hour 3<br /><br />The ecosystem is a complex network of interactions between two types of factors: abiotic and biotic. Abiotic factors are things that aren't alive, such as volcanic activity, temperature, water levels and climate. Biotic factors are living things, such as animals, plants, fungi and bacteria.<br /><br />An example of an abiotic factor influencing another abiotic factor would be lava flows coming into contact with water to form igneous rock, which could then be faced with a abiotic-biotic interaction such as lichens converting the rock into soil, forming a biotic-biotic interaction as plants can grow in the new soil.<br /><br />Biotic factors influencing one another is in some cases symbiosis. Among the symbiotic relationships, you have mutualism, in which both organisms benefit. An example of this could be bees and flowers; the bees pollenate the flowers in exchange for nectar. Then there's commensalism, in which one organism benefits and the other is unaffected. Commensalism can be seen in a remora trailing a shark. The shark is unaffected, but the remora benefits by being able to eat any food the shark leaves behind as scraps. Third, there's parasitism. Parasitism is defined as one animal benefiting at the other's expense. An example of parasitism would be a tapeworm within a person, syphoning nutrients from the person's body. The last type of symbiosis is competition. Competition is a relation in which neither side benefits, as while they compete there's less resources to go around. An example of competition would be lions and cheetahs competing for a similar food source: impalas. Neither side benefits because one less impala in the wild is less food for them.<br /><br />To conclude, the ecosystem is a complex network of countless interactions between abiotic and biotic factors.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-51130991636549628912015-04-29T18:35:38.029-05:002015-04-29T18:35:38.029-05:00Sorry for being late, I don't know how I forgo...Sorry for being late, I don't know how I forgot.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-43540611624319748082015-04-29T18:34:42.610-05:002015-04-29T18:34:42.610-05:00Moerbitz S 5
Organelles are the most important par...Moerbitz S 5<br />Organelles are the most important part of a cell because they do all the important things in a cell. One organelle is called the mitochondria. <br /><br />The mitochondria is the organelle responsible for turning sugars into ATP. Also, the mitochondria has its own set of DNA so the human body cannot recreate it during cell division. Scientists think that mitochondria and human cells grew together at one point in history because they both benefited from each other.<br /><br />Another organelle is the lysosome. This acts as a waste removal system for the cells. Lysosomes are only found inside of an animal cell .<br /><br />The chloroplast is an organelle that is specific to plants. The chloroplasts are a vital part of an plant cell. This is where photosynthesis (taking the suns energy and carbon dioxide gas, and creating glucose and oxygen molecules) takes place. Photosynthesis is a very important part of any plants life, because it provides them with energy to live, but it also helps out humans a lot too. Without photosynthesis we wouldn't be able to breathe. Also glucose is an important energy source for our body. <br /><br />One thing that I have learned from other peoples posts is that there are more cells of bacteria in the body of a human than there are the cells that that person actually makes.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-26168268115551214542015-04-29T17:08:22.559-05:002015-04-29T17:08:22.559-05:00Lucie O, P2
During the Evolution unit, we were int...Lucie O, P2<br />During the Evolution unit, we were introduced to our ancestor "Tiktaalik". A hint, in that we descended from fish. Tiktaalik is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the late Devonian period. Tiktaalik has what appears to be hind legs. Used for prompting itself up, to the shore and dragging its way out of the water source. Along with fore fins, Tiktaalik has a massive shoulder that expanded scapular and coracoid elements and attached to the body armor, large muscular scars on the ventral surface of the humerus, and highly mobile distal joints. The bones of the fore fins showed large muscle facets, hinting that the fin was both muscular and had the ability to flex like a wrist joint. <br />With this information provided to us, scientists are able to use these key points off of this strange species to come up with a hypothesis. The idea that we, humans, were once aquatic. This also proves why, shown in our worksheets, we have gills that later turn into muscles to move our ears. <br />These unnecessary muscles provide more evidence siding with the idea of once being the same as fish. Along with that evidence we come to realize that most forelimb-ed creatures have the same features as us humans during creation. Arising more curiosity that Tiktaalik might have been the start of not only fish, and humans, but monkeys, chimps and other creatures with limbs. <br />More studies have shown that Tiktaalik was the 'starter' for ribcages. Because of the spiracles on the top of the head, which suggest the creature had primitive lungs as well as gills. This would have been useful in shallow water, where higher water temperature would lower oxygen content. Along with this research, some debate whether Tiktaalik is more fish than mammal. Because of the lacking characteristics that most fishes have—bony plates in the gill area that restrict lateral head movement. This makes Tiktaalik the earliest known fish to have a neck, with the pectoral girdle separate from the skull. This would give the creature more freedom in hunting prey either on land or in the shallows.<br />I've learned that we all may seem very different and though we are quite 'complex' we were once the same as a fish, something known to be much lesser than humans. Looking into someones notes, I was able to learn about cloning. How Dolly, the sheep, had been tested 434 times until a final result of herself. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-37374880028389218052015-04-29T00:02:13.570-05:002015-04-29T00:02:13.570-05:00In biology we are studying the digestive system. A...In biology we are studying the digestive system. Aiding the functions of the digestive organs are the accessory organs. These include the liver, gall bladder, pancreas, tongue, and salivary glands. Each one has its own function but helps to quicken and simplify the process of breaking down food for our bodies to use. <br /><br />The liver and gall bladder work together to break down the fats in food. Helping each other is just what they do. The liver makes the bile that will later break down fat and the gall bladder is the storage for the bile that is not being used. The liver also processes the nutrients that are absorbed by the small intestine. The gall bladder is located inferior and posterior to the liver. Bile is what breaks down the fat in our system. Without the liver and gall bladder our food would not be digested the same.<br /><br />The pancreas excretes enzymes to break down the protein, lipids, carbohydrates, and nucleus acids in food. While the liver and gall bladder help the breaking down of fats, the pancreas is breaking down most everything else. The function provides further breakdown of the food after it has gone through the stomach. Many things would have to change in your diets if a pancreas was not present. <br /><br />The first step in the digestive process starts in the mouth. Your tongue and salivary glands are also considered part of what is known as the accessory organs. Saliva is produced by the salivary glands located under the tongue. Chemicals in the saliva start the breaking down process before the food even gets through the esophagus. Part of this breaking down is also helped by chewing and breaking the larger parts into smaller ones. This way the chemicals can work faster. Salivary glands start the digestive process. <br /><br />Surgery on the accessory organs are common and may or may not have an effect on your system. Removing your gall bladder can keep you off your feet for a few weeks but it won't hurt you in the long run. Liver transplants happen frequently as well. Keeping your accessory organs in check is vital to the needs of the digestive system. <br /><br />The liver, gall bladder, pancreas, Tongue and salivary glands are very important to our digestive system. They may only be accessory organs but the okay larger roles than we think. Each one has its part in the digestive system. I learned from Rachel siebert that the pancreas is about 6 inches long and has lobes all across it. It is located behind the stomach and across the back of the abdomen. Cami, S, 5noreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-51372642912412896792015-04-28T23:26:22.773-05:002015-04-28T23:26:22.773-05:00Ricky,M,P3
Gel electrophoresis is a method used by...Ricky,M,P3<br />Gel electrophoresis is a method used by scientists to separate the different proteins in someone's or something's DNA to ultimately tell who they are and what kind of species they are. One of the many practical uses for gel electrophoresis is part of crime scene investigation. For example say a detective finds a unusual piece of material that contains DNA (dinger nail, hair, blood ect.) they can take that and using other techniques they can take out the DNA and insert it into the gel they have a set of DNA that they can compare to potential suspects DNA to tell if they are the ones that did the crime.<br /> The gel used is 1 of 3 different types agarose which is the kind we used in class and is seed weed based, Polyacrylamide, and starch. A large part of developing this technique came from Oliver Smithies a British born American.<br /> This not only impacts my life but everyone else's by putting criminals in jail where otherwise they could still be committing crimes.<br /> One thing I learned about from someone else's comment is that a invasive species in one that is not native to a area and has a tendency to spread and cause damage to the environment they are found in.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-71801892452021427942015-04-28T22:33:21.049-05:002015-04-28T22:33:21.049-05:00Tony M hour 5
One thing we learned about this year...Tony M hour 5<br />One thing we learned about this year was how soap works. We learned that soap is made of two ends, one hydrophilic (water loving), the other hydrophobic (water hating) this works because the hydrophobic end attached to the dirt, bacteria, ect. and the hydrophilic end attached to the water. So when you wash your hands the water attaches to the dirt, bacteria, ect. and takes it with it down the drain. <br /><br />What I learned from my research was that soaps are sodium or potassium fatty acids salts, which are made from the hydrolysis of fats in a chemical reaction called saponification. Each soap molecule has a long hydrocarbon chain, sometimes called its "tail", with a carboxylate "head". In water, the sodium or potassium ions float free, leaving a negatively-charged head.<br /><br />This impacts my life everyday because we use soap for everything from washing our hands to a cleaning things. Knowing these facts about soap helps me understand what's really going on, and that soap is not actually killing the bacteria but is just removing it.<br /><br />I thought it was interesting in another post how people could not originally digest milk, but over the years humans have evolved to do it.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-61409935174635922132015-04-28T22:31:39.297-05:002015-04-28T22:31:39.297-05:00Ecology = organisms and their environments
Ecologi...Ecology = organisms and their environments<br />Ecologists DO NOT study organisms: they study how organisms interact with other organisms and how the interact with the no living part of their environment but ecology is nothing but simple its a range of many different aspects such as how everything fits together to make any ecosystem. <br />Populations=community <br />Ecology its in the Greek word oikos wish means household or living place.<br />There are two branches the autecology and synecology<br />Ecology was introduced into the field of sociology at a critical period in development of the latter discipline.<br />A natural phenomenon which developed independently of a plan.<br /> Id there was no ecology there would not be anything because we would not be able to survive or interact with other humans and I feel like that would be very hard. Also the affect of the food chain and how consumers eat producers and its just a big chain but in a food web if something gets taken out of that the whole balance is upset.<br />Through these posts I've learned that the body has over 200 cells, if the food web is affected it is usually the humans fault and that the human body used to not be able to digest dairy.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-21785515911096904632015-04-28T22:23:18.936-05:002015-04-28T22:23:18.936-05:00Jack van Dyke, Hour 1
One thing I enjoyed lea...Jack van Dyke, Hour 1<br /> One thing I enjoyed learning about this year was bacteria and the human body. Specifically, the soap lab we did near the beginning of the year. I learned that there are hundreds and hundreds, if not thousands upon millions of bacteria cells on your hands at all times. This was further proven by the lab we did, since even when you washed your hands thoroughly under warm soapy water, a great amount of bacteria was still present.<br /> Upon further investigation, which I did just now, it would seem that there is a chance the soap can become contaminated. This means that bacteria can "invade" the soap bottle, and render the soap essentially useless. Despite this unsettling news, the public health risk associated with this contamination is still unclear.<br /> This information doesn't have a profound impact on my life, however, in some cases, I may choose to just not wash my hands. Now, i know what you're thinking. I must be a dirty dirty boy. I just don't know if it's worth the risk of possibly getting sick from trying to prevent sickness.<br /> One thing I learned from another comment is that the word tundra derives from the Finnish descriptive words of treeless plain.Jack v. Hr 1noreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-69883109326448018292015-04-28T22:17:30.107-05:002015-04-28T22:17:30.107-05:00One subject that we have covered in class is ecolo...One subject that we have covered in class is ecology, which is a branch of biology that deals with the relations of organisms to their physical surroundings. For example; food webs and food chains are comparisons of different organisms in a biosphere. Looking further into the topic of ecology, it is broken down into different parts, like population ecology, community ecology, and ecosystems ecology. In class we learned that there are both biotic and abiotic factors to environments, also that an ecosystem is the interactions of all living organisms that all play a part in affecting populations. The biotic factors are organisms that make up the living portion of an ecosystem. Abiotic factors are the non-living factors of environment. All organisms have a role in an environment; like the producers who make their own energy and make their own food. There are also the consumers that cannot manufacture its own food or energy, like the herbivores, carnivores, and omnivores. Lastly there are decomposers that break down the complex compounds of the dead an decaying organisms.<br /><br />Looking further: Most food chains start out as food webs, they start out showing simple representations of an ecosystem like what eats what and then the food chain becomes a web when it has several trophic levels and shows how an entire ecosystem can be disrupted if an organism is gone or decreased. So mostly saying that the food web is just a more complex model. This information impacts my life beaches it can show me how humans could possibly be affected and changed because of an altered food web causing changes in our ecosystems. It can also give us good information when planning for the future and making choices that benefit all organisms. One thing that I learned from this blog is that animals rely on humans as much as human rely on animals.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-81780383753863949592015-04-28T22:09:56.630-05:002015-04-28T22:09:56.630-05:00Kristin F hour 5
This year in biology, I have lear...Kristin F hour 5<br />This year in biology, I have learned a lot about ecology, which is the study of relationships between living organisms and their environments. In an environment, there are both biotic (living) and abiotic (nonliving)factors that affect organisms. Abiotic factors would include the sun and temperature, and often determine what organisms can live in a given area. Each organism has a habitat, or the place it lives, and a niche, which is the way a species uses the resources of its habitat and what it does in the community.<br />Within ecosystems, there are three kinds of organisms: producers, consumers, and decomposers. Producers are organisms that can create their own food, such as plants. Consumers cannot produce their own food, and rely on producers for food. There are three kinds of consumers: herbivores, which eat producers; carnivores, which eat only consumers; and omnivores, which eat both producers and consumers. Decomposers are also consumers, but they break down the complex compounds of dead and decaying organisms into simpler molecules. There are also food chains and webs that show the energy flow through an ecosystem, and all the possible feeding relationships within an ecosystem.<br />Ecosystems impact everyone's lives because whenever they change, they can impact our food and/or water sources or availability.<br />From other posts, I learned that at one point humans could not digest dairy, but we have clearly evolved and become able to do so. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-85731204768608307672015-04-28T21:55:26.035-05:002015-04-28T21:55:26.035-05:00Alex L p.1
Populations within a ecology are ...Alex L p.1<br /><br /> Populations within a ecology are groups of similar organisms that are found in the same area. These are very important because different species or organism have different niches so that all effects the environment. All the factors that affect communities are due to niches because they can help populations grow or also cause the mortality rate to rise. An example of population in the work force of America are doctors and engineers. Doctors save lives with tools and devices that engineers developed or create. If the doctors didn't have those tools they may not be able to save that life. <br /> I think communities are critical on this planet because everything relies on something. We (students) depend on our parents or care takers to provide food, clothes and shelter, and the depend on their boss to pay them so they can provide. If communities didn't exist species wouldn't mix because there would be no need for communication. <br /> Finally there are 2 basic categories for communities terrestrial( land) and aquatic (water). These contain even mor levels known as biomes, in this situation the distribution is controlled by climate.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-75189919436466503372015-04-28T21:50:36.815-05:002015-04-28T21:50:36.815-05:00Wyatt, B, P1
Cloning is a number of different ways...Wyatt, B, P1<br />Cloning is a number of different ways to create a genetically identical copy of another tissue, cell, or organism. The copied material which has the exact same genetic makeup of the original is called a clone.The first of 3 methods of cloning is gene cloning, which copies the DNA segment and/or genes. The second method is reproductive cloning which can create whole animals; the simplified steps to do this are 1. remove a whole somatic cell 2. transfer the dna from that somatic cell into an egg cell that has had its own nucleus removed. The third technique is therapeutic cloning which creates a very specific kind of cell, a stem cell, which can be used to replace injured or damaged tissue and grow healthy tissue as well. Cloning DNA is basically four steps: 1. breaking apart a strand of dna which is called fragmentation 2. gluing together pieces of dna in a specific order which is called ligation 3. inserting the new pieces of dna into a cell 4. last, selecting out the cells that were transfected with the new dna. <br /><br />The first ever animal to be cloned was a sheep named dolly back in 1996. She was cloned using the reproductive cloning technique. It took the scientists in Scotland 434 attempts before an embryo was actually successful.She lived for 6 years and now her stuffed remains are on exhibit at the National Museum of Scotland.<br /><br />Cloning has impacted my life because farmers can clone their stock to be safer and healthier food.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-72332919794404606142015-04-28T21:39:42.531-05:002015-04-28T21:39:42.531-05:00Laura M. hour 2
the Wikipedia definition of pollut...Laura M. hour 2<br />the Wikipedia definition of pollution is "the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects" (because obviously Wikipedia is the most credible and teacher loved source on the internet.) <br /> In class we learned that pollution is bad and impacts the environment and different environmental cycles in very negative ways. There are a bunch of different kinds of pollution and in order to meet the word number I shouldn't expand on those examples.<br /> I decided for my further research I would look up some statistics so ya here they are (ooh hq transition Laura.) <br />1-pollution and effects of pollution kill over 100 million people globally every year<br />2-in 1975 it was predicted that ocean based pollution (ie cargo ships) dumped about 14 billion pounds of pollution into the ocean (that's about the weight of 14 billion pounds of coffee beans!!)<br /> Both of those riveting facts were found at <br /> Something that I learned from another blog post that I didn't know before was that Abortion is the movement of nutrients into the blood carrying nutrients to cells throughout the body. I was not aware of that but I think it's interesting.Laura MacDonaldnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-8743224581698321662015-04-28T21:34:18.159-05:002015-04-28T21:34:18.159-05:00Caroline Roesner 5 hour Cells.
We first learned wh...Caroline Roesner 5 hour Cells.<br />We first learned what cells are and their role in our body, and we also learned about the various organelles inside each cell, and how they each have a specific role just like our organs. What is a cell? It's definition states that it is the smallest unit of any living form that is capable of prolonged independent existence. First is the cell wall, it is around the cell membrane of plants and algae, it provides protection and support. The chloroplast, is an organelle found in cells of plants and some other things that captures the energy from sunlight and converts it into chemical energy. The endoplasmic reticulum is made of membranes , proteins are modified and the lipids of the plasma are assembled here. The organelle that is a stack of membranes that modifies, sorts, and packages proteins from the endoplasmic reticulum is called the golgi apparatus. A lysosome is an organelle that is filled with proteins that are needed to break some things down. Mitochondrian are organelles that convert food into chemical energy and compounds that cells are able to use. The nucleus of a cell contains its genetic material and controls it's activities. A thin flexible barrier, that surrounds the cell,the plasma membrane regulates what enters and leaves a cell. A ribosome is made of RNA and proteins, it is where proteins are assembled. Lastly the vacuole, it's an organelle that stores material like water and salt. <br />We learned about the cell when studying what we are made of, how it works, and how our systems work together, like how we have specialized cells. <br /><br />This has helped me understand how cells work and regulate. Also, the large role they play.<br /> I learned a lot about photosynthesis and how it works, I also learned the equation for it from another persons paragraph.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3332415531079335274.post-66329558715127333742015-04-28T21:19:29.846-05:002015-04-28T21:19:29.846-05:00Natural selection is the process whereby organisms...Natural selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. Charles Darwin used natural selection to help his theory of evolution. He learned about natural selection on his trip to the Galapagos islands. While there he noticed many different species of tortoises which had special modifications to help them live in their own habitats. Charles proposed that nature would select those best fit to survive and the other would die. Since the best would survive even better babies would be born. This cycle is never ending and also may be the reason why humans are the way we are. Natural selection allows plants and animals to change and become better and without it we might not be the way we are.<br /><br />Without natural selection many animals such as pigs wouldn't be the way they are. Farmers around the world changed the ways animals and plants looked by choosing to breed only the best. Because of this we now have better tasting foods and stronger animals.<br /><br />I learn from Ryenne H that there are, in humans, about 200 different types of cells.Anonymousnoreply@blogger.com