Which process tends to reduce variety within a population?

A. Natural selection

B. Random fertilization

C. Independent assortment

D. Crossing over

What is the function of topoisomerase? a. relieving strain in the DNA ahead of the replication fork b. elongation of new DNA at a replication fork by addition of nucleotides to the existing chain c. the addition of methyl groups to bases of DNA d.

Suppose that after the cell below undergoes meiosis i and meiosis ii, the result is one gamete with two chromosomes, two gametes with three chromosomes, and one gamete with four chromosomes. what has occurred? (click on the correct answer.)

What protests form long foot like projections of their cell membranes and cytoplasm

What are the three ways to increase force production of a muscle occurs due to factors of the muscle itself?

Harry and Cassie wanted to conduct an experiment to see how many licks it takes to get to the center of a tootsie roll pop. Below is their procedure and above are the results. 1. Obtain test subject. 2. Obtain unwrapped tootsie roll pop. 3.

Compare and contrast biotic and abiotic factors

Why is it necessary to liquefy air to separate its components?

Select all that apply. Which of the following are vertebrates? starfish earthworms tunicates crab amphibians lancelets octopus grasshopper

What do scientist use to represent evolutionary time

The cytoskeleton is a membrane bond organelle. A True B False