Ilc lesson 1

KEY QUESTIONS Lesson 1: The main purpose of the trip for Darwin was so he could observe, record and collect information from the coasts of the other lands they were visiting. The significance was that Darwin made discoveries that would change science forever and help him develop his theory. Antibiotic resistance is an example of evolution because it had to do with the difference in population (including resemblance to ancestors) and also generations. Some species have the capability of resisting antibiotics whereas others could get killed. That ones who are capable of the resistance will live on by passing it on to their next generations however for the other half it will lead to a difference in the population, numerically and in appearance. The connection between Charles Lyell and Charles Darwin is significant. After reading Lyell’s Principles Of Geology, Darwin got a better understanding of his own thoughts. Lyell’s work emphasized that the earth is a billion years old. Although Darwin had his theory flowing in his mind he couldn’t find the right time frame but after considering the theory that the earth was old, the theory of evolution fell into place. Darwin realized the solution of evolution was that we had limitless time. Lesson 2: Let’s talk about having a baby because I’m not sure how to explain in words. There are two types of DNA coming together. The baby inherits some features from the mother and some from the father this is natural selection. The way the baby develops is like evolution. And the way it turns out could be the natural variation because the skin type could be different or the eye color yet still from the same parents. One of the three lines of evidence Darwin gave was variation within the population, this supports natural selection because everyone is different because they inherit different genes. The next one is a struggle for existence, this supports natural selection because the better an organism is characteristically suited to its environment the higher the chances of reproducing and surviving. Finally, there is the descent with modification, this also supports natural selection because at one point according to some humans were apes but we developed into less hairy creature and we descended but modified. One of the advantages I would consider with GMF’s as a farmer is the nutrition. Nutrition is very important to the animals on the farm. Because if you do not have good food they would die. One of the disadvantages that would be relevant is the economic concerns. If you do not have enough funding you cannot feed the animals the right food or take care of your fields properly. If you live in developing countries you might need to put money towards getting water or getting the proper equipment to take care of the farm I think it is the idea of evolution and how organism adapt. So in order to easily access their food giraffes eventually had longer necks because they would stretch and eventually evolution provided it for them. Lesson 3: The genetic drift can impact the survival of certain organisms when it is in a smaller group because when the group is smaller it is more likely for alleles to continue onto the next generation which will result in less genetic variation. Many of the alleles will continue to be the same without a significant change from generation to generation. Population bottlenecks and founder effects. The founder effect is taking place because a small group of birds came in and now a colony is being started because they started reproducing. Which means that the colony may have reduced genetic variation from the original population. Mutations are random changes in genetic code, only mutations that occur in the sperm and egg cells can be passed on to become part of the gene pool and from there genetic variation may more versions of that mutation. Afterwards the best suited variation which is going to be best suited for the environment and will actually survive will be passed on to offspring. Which will finally lead to eventually the majority of the population carrying the same trait. The larger the antlers for the moose the better suited for its environment and the more likely it is to survive. Just like human women are more attracted to hairy human men, moose women are more attracted to large antlered moose men which would lead to them reproducing and future generations having the same trait. Alter the generic code of a species or organism which would lead to future generations differing from the original. Changing the environment of an organism which would lead to a forced adaptation. Lesson 4: temporal isolation behavioural isolation mechanical isolation habitat isolation gametic isolation Geographic isolation takes place when populations first become isolation because of some physical barrier. With respect to their environment different alleles will be chosen for the two populations. The two populations will then undergo many changes which will eventually lead to both populations not being able to interbreed. They will become separated and that is when speciation has taken place. The increasing isolation of populations could result in speciation because the organisms are being separated from exchanging genetic species with other organisms of the same species which would over time lead to new organisms or species being produced and eventually there will be more and more evolution Compared to a typical worm it is much easier for a moose to travek from forest to forest. However worms are much smaller in size and it takes them longer to migrate and could lead to fewer worms. Out of the three types it is directional selection because just like the short-necked giraffes evolved into long necked giraffes so they could be better adapted to their environment and so they could better survive the same goes for lighter bones on birds because the heavier the birds the harder it is to fly and the harder it is to adapt to its environment. Therefore, evolution would permit the bones of the bird to get lighter over time.