1) Is a compound a mixture or a pure substance?

2. Which of the following is true about chemical energy? A. Chemical energy is released when bonds in ADP are broken to form ATP. B. Chemical energy can be stored more efficiently as glucose than it can be as ATP. C.

True or false The plentiful nature of resources in the tropical rainforest reduces competition for them.

Which of the following is the correct sequence of events for muscle contractions? Which of the following is the correct sequence of events for muscle contractions?

Some flowers have a complete set of male and female parts for fertilization. a. True b. False

Where is oceanic crust thickest?

Which is an effective way to manage stress

What are two ways that scientists can study Earth's Climate history

How many photosystems can be found in a prokaryotic cell

How can scientists study ecology?

Which of the following marcolecules consist of long chains of amino acids?