Read the questions below carefully and provide accurate, complete answers. paper
ID: 185976 • Letter: R
Question
Read the questions below carefully and provide accurate, complete answers. paper if needed. Use extra In an experiment you grow three different experimental plant plots: a control (no herbivores or added nutrients), plants with herbivores only, and plants with added nutrients (herbivores still present). Given these results, describe what accurate conclusions can be drawn given the statistical differences represented. (3pts) 1.) 010 1.l Control Herbivores Nutrients 2.) Compare and contrast the three different forms of selection. Give specific examples for each. (3pts) 3.) Define evolution and describe, in some detail, four different lines of evidence that support it and how? Give drawings and/or examples for each. Feel free to attach on an additional sheet(s) (6 pt)Explanation / Answer
3.) Evolution is defined as the process by which it is believed that different kinds of organisms have developed from earlier forms in the history of life forms on earth.
Different lines of evidence that support the evolution are as follows:
a)Fossil records - appearance of fossils in sedimentary rocks in such an ordered array. For example, the fossil record of dinosaurs
b)Comparative anatomy - the body structure of different organisms showing common descent. For example, whales, bats, cheetah and humans share similarities in pattern of bones of forelimbs
c)Biogeography - the geographical distribution of the species.
d)Comparative molecular biology - anatomy at molecular level. For example, similarities in proteins and genes.
4.)From 1976 to 1978, there was a severe drought which altered the proportion of small and large seeded plants. The average size of the seeds reduced during this period.
The finch population evolved on the island itself. From the original seed eating features, many other forms with altered beaks arose, enabling them to become insectivorous and vegetarian finches. So, with the available food sizes, their beak size also evolved.
Seed size became an evolutionary selective pressure on beak size and the end result. This can be explained as the size of seeds changed from small to large, the beak size also evolved accordingly and it was required for the survival of the finches, otherwise they would have not been selected by the nature.
Yes, there was a statistical difference in seed size between Dec.1976 and Jan.1978.
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