The exchange of gases between the blood and body's cells is called

a. breathing

b. internal respiration

c. external respiration

d. cellular respiration

What is a land breeze? A. air that travels in a curved path B. air that blows at night over short distances C. air that flows steadily in different directions D. air that blows from the poles to the equator

What is the ecosystem service of water in a reservoir behind a dam

Circulatory system. confused?!

When a bee drinks nectar from a flower, it gets pollen on its hind legs (pollen baskets), When the bee visits another flower, it transfers the pollen from the first flower to the second flower.

How are the weak and the strong forces alike? A. They have infinite ranges. B. They are attractive only. C. They are attractive and repulsive. D. They have very small ranges.

Chemical reactions that release energy Question 6 options: will always explode. need catalysts to occur. often occur spontaneously. will not occur.

Match the amino acid (AA) with its correct side chain category: 1) proline A) acidic AA 2) histidine B) nonpolar AA 3) alanine C) basic AA 4) threonine D) polar AA 5) tryptophan 6) aspartic acid

In which structure of the female reproductive system are eggs priduced

In a forest, rabbits are the prey to owls. An increase in the number of rabbits in the forest would result in Group of answer choices A. an increase in the number of owls. B. an increase in the number of producers.

How are viruses different from bacteria Bacteria are heterotrophic while viruses are autotrophic. Bacteria are living organisms; viruses are not. Bacteria have a membrane bound nucleus while viruses do not.