When does a comet's bright tail appear?

a.

when it nears the moon

b.

when it nears another comet

c.

when it collides with a planet

d.

when it nears the sun

As the masses of two objects increase, how does the gravitational force between the two bodies change? A. The gravitational force begins to repel the objects. B. The gravitational force decreases. C. The gravitational force increases. D.

The DNA of virus A is inserted into the protein coat of virus B. The combination virus is used to infect E. coli. The virus particles produced by the infection are analyzed for DNA and protein. What results would you expect? A.

When energy is released from sugar molecules, many by - products are formed. Which by - Product is expelled from the cell? a. C b. CO2 c. H2 d. O2

Which step happens first in DNA replication? A. Protein is formed from the DNA. B. Base pairs are broken apart. C. The replication fork forms. D. The DNA is checked for errors.

What term is used to describe the animal in a group that is the largest, strongest, or has the highest status? 1. predatory 2. uncooperative 3. aggressive 4. dominant

Who was the first person to look at living cells using a microscope

What organelle is most specialized?

What is the body of a sponge is covered with many small opening?

Population Growth Which of the following refers to the movement of individuals out of a particular area? A. Immigration B. Emigration C. Transporting Population growth is a big concern for ecologists.

How does a caterpillar get it's energy?