BIOA02H3 Chapter : Ecology

Which of the following best describes the principle of evolution by natural selection?

A. Individuals within a population are genetically identical and natural selection occurs randomly

B. Individuals within a population exhibit genetic variation and those that are best adapted to their environment survive

C. Individuals within a population exhibit genetic variation and those that are least adapted to their environment survive

D. Individuals within a population undergo genetic mutation and natural selection occurs randomly

E. Individuals within a population exhibit genetic variation and natural selection occurs randomly

On the planet Trogus, the population of Trogites have an autosomal gene, HDZ, with two alleles, T and t. T is dominant to t. Individuals with the T allele in their genotype show a propensity for sorbet, while the remainder prefer ice cream. In multiple population studies, 60% of individuals with the TT genotype prefer sorbet, 25% of Tt individuals prefer sorbet, and 5% of tt individuals prefer sorbet.

In an F1 cross of Tt x Tt genotyped individuals, among the F2 population of individuals who prefer ice cream, what is the probability that a random individual has the TT genotype?

A. 0.333.

B. 0.995.

C. 0.667.

D. 0.001

E. 0.140.

A population of a species exhibits logistic growth. If thecarrying capacity of their habitat is 240 individuals and r = 0.3(individuals per month), what is the maximum population growth ratefor the population? Show all your work.