The air you breathe into your lungs on a daily basis mostly consists of

a. oxygen

b. carbon dioxide

c. nitrogen

d. hydrogen

Explain how energy travels through the food chain. I know it starts with the sun, then the plants. Can you finish it?

What is a group of organisms of the same species that live in an area

The clinic nurse is assessing an older adult client who fell. the nurse asks if the client ever feels dizzy or has problems with balance. for what is the nurse assessing?

White blood cells that are increased in allergic individuals are the

The color of a horse's coat is determined by its

How does the live ensure that the body will have a constant supply of energy

How do scientific theories compare to hypothesis

A woman gives birth to a son. Two years later, she gives birth to another son. What is the probability that her third child will be a girl? Explain your reasoning.

What are the two major purposes for mitosis?

How do organisms come to live on newly formed volcanic islands?