A person walks through the woods. A branch falls suddenly, almost hitting him, and his heart suddenly starts racing. What part of his nervous system causes his heart to race?

Electromagnetic waves used in ovens and cell phone are called

Both plant and animal cells contain- a. a cell membrane, cell wall, and a nucleus. b. a cell membrane, cytoplasm, and a nucleus. c. mitochondria, a cell membrane, and chloroplasts. d. mitochondria, a cell wall, and chloroplasts.

Why do plant cells have large vacuoles?

What scientists do that is basis for their investigations?

The frist women's rights convention was held in

4. During what phase do centrioles begin to migrate to opposite poles of the cell?

Are made of long chains of amino acids

Maria is testing the behavior of monkeys. First, she shows the monkey a rectangle. Then she shows the monkey a rectangle and a cylinder. If the monkey pushes aside the rectangle, Maria gives the monkey a food reward.

Why is the phloem in a leaf important to the roots of a plant? A. It provides the roots with carbohydrates. B. It provides the roots with nutrients from the soil. C. It transports water to the leaves from the roots. D.

A mutation causing an addition or a deletion of one base pair resulted in the production of a nonfunctional mutant protein. The sequences of the normal and mutant proteins are given below.