Which mechanism results in changes in allele frequencies in a population from one generation to another?

a. gene flow
b. mutation
c. genetic drift
d. natural selection
e. disruptive selection


c

Biology & Microbiology

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Biodiversity hotspots are defined as areas where biodiversity is both ____ and ____

a. concentrated; endangered b. researched; protected c. low; increasing d. overexploited; studied e. low; declining

Biology & Microbiology

Which mineral ion is required for ribozymes to become active and begin self-replication?

a. ferrous iron b. ferric iron c. zinc d. magnesium e. selenium

Biology & Microbiology

How does exchange of nutrients, gases, and wastes occur during pregnancy if maternal and fetal blood never mix?

What will be an ideal response?

Biology & Microbiology

Cholesterol dissolved in the blood is carried by

a. albumin. b. high-density lipoproteins. c. low-density lipoproteins. d. triglycerides. e. both high-density and low-density lipoproteins.

Biology & Microbiology