Two populations of black-tailed rats became separated from each other by the formation of large canyon, thus preventing their interbreeding. the condition described is

Explain why ecosystem diversity results in species diversity in a healthy biosphere

With regard to enzymes, key is to lock as a) substrate is to activation energy eliminate b) product is to substrate. c) enzyme is to active site. d) substrate is to active site.

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48