Which one of the following human organ systems is mainly made up of glands and hormones? Select one of the options below as your answer: A. Endocrine system B. Excretory system C. Nervous system

Which is likely to occur more rapidly in response to an extracellular signal. a. changes in protein phosphorylation b. changes in proteins being synthesized?

What are the deepest receptors in the skin for?

Which ecosystem is found where the fresh water of a river meets the salt water of the ocean?

Biomes may be terrestrial aquatic or atmospheric true or false

Define the word DNA?

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.

What job does each organelle do in a cell?