All living things are made of cells. What is one way the single celled algae is different from the other two organisms?

A) It lives in water.

B) It is less complex.

C) It does not need food.

D) It does not reproduce.

In a pond ecosystem, what generally happen over a long period of time? A) The pond will fill in, grasses and trees will grow there B) It will become deeper than a lake. C) The water will become stagnant and everything in the pond will die.

This layer of the heart wall consists mostly of the cardiac muscle and is the thickest and middle layer of the heart wall?

What are substrates? A. the products of chemical reactions B. the enzymes used to speed up chemical reactions C. the reactants of enzyme-catalyzed reaction

What is meant by the genetic code being nearly universal?

An acute infection causing fever and convulsions with tonic spasms of skeletal muscles is called:

Paul Templet describes the process of eutrophication in the Gulf of Mexico. According to Templet, which of the following initiates the process? a. Phytoplankton feed on nutrients, which creates plankton blooms. b.

The Alligator and the Python are competing for top predator. What affect can the introduction of a non-native species have on an ecosystem?

When a pitcher is holding a baseball, the ball has what kind of energy. After the pitcher throws the ball, the ball has what kind of energy?

Which species are susceptible to endangerment in the future?

What happens to fresh water that flows into salt water?