If two DNA samples showed an identical pattern and thickness of bands produced by gel electrophoresis, the samples contained

a. the same amount of DNA.

c. the same DNA molecules.

b. fragments of the same size.

d. all of the above

What three things must be accomplished to enable an organism to maintain homeostasis?

A student mixed equal amounts of water and oil together in a bottle and found that the oil always floated above the water. What can be said about the density of oil versus water? A. their densities are equal B. oil has a greater density than water C.

What type of injury is not likely to occur from a chemical

Which cells make antibodies a-viruses b-t cells c-bacteria d-b cells

When a person speaks, brain waves and blood flow are especially likely to reveal increased activity in the?

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?

What do scientists think forms the Moon's core?