4.3.5 Practice- Diversity of Life- CHEM 10 (ALL ANSWERS ARE CORRECT) 2023

.3.5 Practice- Diversity of Life- CHEM 10 (ALL ANSWERS ARE CORRECT) 4.3.5 Practice: Diversity of Life 5/15/17 1. The graph shows the distribution of the weights of individual dogs in a population of dogs. Answer the following questions using the axes provided. a) Draw a possible curve for population after several generations if the population has stabilizing selection. (1 point) b) Draw a possible curve for the population several generations later if the population has directional selection. (1 point) c) Draw a possible curve for the population several generations later if the population has disruptive selection. (1 point) d) How do these selective pressures affect the genetic variation in the population? (1 point) These selective pressures affect the genetic variation in the population because after the pressure is exerted, only the strongest survive. 2. a) In what way is the genetic code in all organisms the same? (1 point) The genetic code in all organisms is the same because of the relationship between codons in DNA and the 20 amino acids found in proteins. b) Humans and chimpanzees have very similar DNA. What does this say about these two species? (1 point) This says that humans and chimpanzees must have had a recent common ancestor. c) Did humans evolve from Neanderthals? Explain. (2 points) Humans did not evolve from Neanderthals because Neanderthals were a separate branch of early humans. However, they were not as intelligent as their human counterparts and were unable to adapt when the ice age began to end. The Neanderthals eventually died out. d) What other hominids evolved from the same common ancestor as humans? (1 point) Chimpanzees are hominids that evolved from the same common ancestor as humans. e) Dolphins and porpoises are closely related species. Name three ways that you would be able to find evidence for this. (3 points) 1) Both dolphins and porpoises are closely related to whales. 2) Both are very intelligent creatures. 3) There kingdom, phylum, class, and order are the same names. 3. For each environment below, describe why you think it would have a high or low rate of speciation.