Number of Anoles leaves and prevent themselves from falling. So in 201O, 15 years after beginning the experiment, scientists collected data to see if the populations on the islands with predators showed any physical adaptations to the change in their habitat. Below is a summary of the data the scientists collected: Graph 2 Graph 3 Toe Pad Size on Island without Predators (2010) Toe Pad Size on Island with Predators (2010) Average toe pad size = 15 mm2 Average tope pad size = 19.5 mm2 12 12 ill. L 10 10 8 10 11 12 13 14 15 16 17 18 19 20 14 15 16 17 18 19 20 21 22 23 Toe Pad Size (mm2) Toe Pad Size (mm2) 2. Compare the data in Graph 2 and Graph 3. How does the toe pad size on islands with predators compa to the toe pad sizes on islands without predators? Average Perch Height (Centimeters) Graph 1: Perch Height of Anoles with and without Predators Present 130 Islands WITH predators 120 Predators introduced on Islands WITHOU 110 half the islands in 1995 predators 100 90 80 70 60 50 40 1995 1996 1997 1998 Year 1.

What is the impact of small population size upon population genetics? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a They may not reflect the composition of the population. b The mating between individuals becomes too systematic. U Individuals move too freely into and out of the population. d There is no impact.

Imagine you were to collect data from simulation 2 (negative selective pressure on SS genotypes) over five generations. The frequency of the S allele over time is graphed below. The graph shows a rapid decrease in the sickle cell allele frequency in the first generation but a slower decrease in later generations. By the fifth generation, the allele is not completely eliminated from the population. Provide two plausible explanations for why the S allele persists after five generations.

Explain what is required for evolution by natural selection to occur in a population.

A hypothetical population has two alleles for a “B" gene: B1 and B2. In a random sample of 50 diploid zygotes (for a total of 100 alleles), the following genotypes were found: 20 B1B1, 20 B1B2, and 10 B2B2 The above values represent the initial genotype frequencies of zygotes in the population. Let's say that selection acts against the B2 allele, and all 10 individuals with B2B2 genotype die off before reaching maturity (leaving 0 B2B2 individuals). (The number of surviving adults in the population is 40, so the number of alleles is 80). What is the new observed frequency of the homozygous dominant genotype? O A. 0.10 О В. О.70 O C. 0.25 O D.0.50 O E. 0.75

Suppose a population of mice is subject to a few years of very cold, dry winters that drastically decreases their numbers. After the decrease in population size, there was a population of 200 mice, with 182 showing the dominant long tail phenotype and 18 showing the recessive short tail phenotype. a. What is the frequency of the recessive allele? b. What is the frequency of the dominant allele?

Cana a change in the physical enviroment of a population result in evolution by natural slection?(hint: remember the peppered moth's camouflage and color changes of tree bark due to pollution)