What is the term for the substances that are changed during a chemical reaction?

Why is it important to aquatic animals that ice floats?

In what cell organelle does photosynthesis occur?

Identify this reaction: 6H2O + 6CO2 + sunlight → C6H12O6 + 6O2.

True or False: When oxygen is not present aerobic cellular respiration can still occur.

What type of molecule is formed by linking amino acids?

True or False: Heterotrophs are the only organisms to perform cellular respiration.

The activation energy needed for a chemical reaction is decreased by a

The energy in the food produced by autotrophs or taken into the bodies of heterotrophs must be changed into a form that cells can use. The energy-transferring molecule used by cells is —

Maintaining a stable internal environment is known as-

How many ATP are produced by anaerobic cellular respiration (fermentation)?

What part of the plant would you expect to find the most chloroplasts in?