The axons of a motor neuron release a neurotransmitter which generates an impulse to contract a muscle. What is this neurotransmitter called?

Explain the process by which the land, atmosphere, and oceans of earth formed

What can you logically infer from the following facts: (There is a greenhouse effect (Carbon dioxide is a greenhouse gas (People have increased the concentration of carbon dioxide in the atmosphere dramatically since industrial times A) The Earth is

Five types of food for a healthy diet

Energy must be transformed in ecosystems because?

What type of mutation causes cystic fibrosis?

Which is a nonliving thing because it is not able to reproduce? a. bacteria b. cactus c. snake d. dust

Give examples of a property that depends on both heritage and environment

What is a reaction to tissue damage caused by injury or infection?

Where do the three steps of cellular respiration occur?

The smallest and most exclusive grouping