What happens when the lungs recoil?

A. Inspiration occurs.

B. Internal respiration occurs.

C. Ribs and diaphragm muscles contract.

D. Expiration occurs.

An interconnected series of tubes in the cytoplasm is called the.

What must be done to breed dogs for a particular trait? a. Mate two dogs that have the desired trait. b. Protect dogs with the trait from natural selection. c. Mate any dogs and see what variations occur. d.

In what place would you find the most organisms

3. Define food web.

How many planets do we have

Would you expect a tall desert plant to be a vascular plant explain

Describe how the population of the Earth increase if the number of children being born is less?

What is defined as all of the living and non-living components of a particular geographic area?

Most reptiles and all birds are, meaning that their young develop in fertilized eggs laid outside the mother's body. in contrast, most mammals are, meaning that their young develop inside the mother's body.

What is heamoglobin