To avoid being digested by their host, endoparasites have a thick protective covering called the

a. cell wall.

c. protoplasm.

b. cilia.

d. tegument.

To ensure that living organisms have the elements that they need, the elements move in which type of cycle]

What are the three types of interactions between organisms in an ecosystem

Some organisms consist of just one cell. True/False True?

Virus ... alive or not ... keep the debate comin in!

What results when animals live together in extremely large groups? A. They rapidly use up resources. B. They can't develop their own territory. C. It becomes easy to divide food. D. It's easy to assign hunting responsibilities.

How does light intensity affect oxygen production?

Which organism would be classified as an echinoderm?

Hank has a very detailed model of the solar system where each planet is made out of granite rock. Since his little sister really liked the model, he spent two weeks in his dad's workshop building her a Styrofoam copy.

Match each theory with the correct description 1 big bang theory 2. inflation theory There was no initial explosion. The universe has always been and continues to be as it is now.

How are all living thing made of cells