Before mitosis begins, a cell makes a copy of the DNA in the nucleus. What term is used to describe this process of making an exact copy of the DNA?

A)

duplication

B)

fertilization

C)

hybridization

Eliminate

D)

replication

How does a decrease in biodiversity impact an ecosystem?

The normal pacemaker of the heart is the

What three groups can animals be divided into based on how they get energy?

Polysaccharides are composed of what monomers (building blocks) ?

A protist has a surface area-to-volume ratio of 5:1. A human intestinal cell has a surface area-to-volume ratio of 2:1. Which of the following statements is true?

A protein contains 100 amino acids. how many nucleotides are in the gene for that protein?

Population 1 stars are found in what area of the milky way

A cell is halted in the G1 phase of the cell cycle. Which best explains why the cell has not moved into the S phase?

If you set up an experiment and the results do not support your hypothesis, what should you conclude? A.) You may want to alter some aspects of your experiment and try it again. B.) You should give up on this research project. C.

The cancellation of two waves occurs because of which of the following