Allopatric speciation is compatible with both the gradualistic and punctuated equilibrium models of evolution.

a. true
b. false


Answer: a. true

Biology & Microbiology

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There are two main subgroups of primates: the wet-nosed primates (Strepsirrhini) and the dry-nosed primates (Haplorhini). Which of the following belong to the subgroup with a wet nose and a fixed upper lip?

1.apes 2.humans 3.lemurs 4.monkeys

Biology & Microbiology

Which of the graphs above best represents the relationship between the intensity of directional selection and the genetic variation present within a population?

A) Graph A B) Graph B C) Graph C D) Graph D E) Graph E

Biology & Microbiology

A "5? cap":

a. prevents translation. b. prevents the binding of ribosomes. c. marks the mRNA for degradation. d. is added to mRNA but not pre-mRNA. e. protects mRNA from degradation.

Biology & Microbiology

As a pond starts to dry out at the end of the rainy spring season, a researcher notices that toads

burrow into the soil where they can hibernate for up to nine months. What is the benefit of hibernation?

a. reduced metabolic rate that ensures survival b. increased body temperature that ensures survival c. a period of time during which the animal completes sexual maturity d. all of these

Biology & Microbiology