What happens to a cell in the S phase?

A. The nuclear envelope develops around each set of chromosomes.

B. DNA replicates to form two copies of chromosomes.

C. Sister chromatids separate out from the chromosomes.

Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants? a. dependent gametophytes b. ovules c. pollen d. alternation of generations

The concentration of solutes in a red blood cell is about 2%. Sucrose cannot pass through the membrane, but water and urea can. Osmosis would cause red blood cells to shrink the most when immersed in which of the following solutions

What is an acid? A. a substance that can donate an H + ion B. a substance that has a high pH value C. a substance that can accept an H + ion D. a substance that is alkaline

The virus infecting civilized only in the dorsal root ganglia on what part of the neuron is located in

Explain how primate hand features increase fitness and give one example. When writing about your example name the hand feature that you have chosen and explain clearly why it increase fitness in a tree environment.

What food source is available to animals in benthic zone and marine habitats

The process of breaking down a larger molecule, called a ploymer, into its monomets is called what

Carol is enjoying eating her dinner. While eating, she notices that her saliva secretion is higher than normal and that she feels good and relaxed. What causes this relaxed state?

What is the difference between bacillus, coccus, and spirillum

What is always true of scientific practices a. They prove a hypothesis to be correct b. They involve steps performed in the same order c. They seek to produce verifiable data d. They lead to the same interpretation