Where does the exchange of materials in and out of a cell take place?

A.

cell membrane

B.

nucleus

C.

chloroplast

D.

chromosome

What will most likely happen to this ecosystem if the herring are killed by a virus?

Briefly describe the functional recovery of brain after brain injury or stroke.

1. The nutrient availability of aquatic ecosystems is the? amount of nitrogen, oxygen, and other elements dissolved in the water. number of other organisms present in the water. amount of rainfall the water receives.

The mayhaw fruit trees produce a fruit that has never been cultivated by humans. two mayhaw trees are growing in a field.

A drink is made up of mostly water. a small amount of sweet powder is stirred in using a spoon. the powder in the solution is the A. suspension B. polarity C. solute D. solvent

An over-response of the body to a specific substance is called

The thymus functions strictly in maturation of t cells. the thymus functions strictly in maturation of t cells. a. True b. False

A plant that has red flowers was crossed with a plant that has white flowers. All of the offspring produced pink flowers. In this plant: A. the gene for red flowers is dominant. B. the gene for white flowers is dominant. C.

The process by which unspecialized cells become specialized cells is called

How does the mass of an object affect its a its acceleration during free fall