Which natural event produces oxygen, which can then be used by humans and other organisms?

a. evaporation of water

b. respiration by consumers

c. photosynthesis by producers

d. chemosynthesis of sulfide

What molecule is used by the enzyme ATP synthase to form ATP? ADP NADH ATP FADH 2

3. Looking at some pond water under the microscope, you notice an unfamiliar rod- shaped cell about 200 mm long. Knowing that some exceptional bacteria can be as big as this or even bigger, you wonder whether your cell is a bacterium or a eukaryote.

Which transport process is the main mechanism for the movement of most macromolecules by body cells?

Which of the following is a biotic factor of an ecosystem? A. a rock B. air C. grass D. climate

What gives each amino acid its unique properties? its side group, its amino group, its carboxyl group, it sequence

What factor explain why tundra biomes remain cold year round but taiga biomes have alternating warm

Part of the brain that coordinates movement

What purpose does fuel wood serve

Nutritional requirements during the Adolescent years are

Which of these structures forms a complete ring around the airway? hyoid bonetracheal cartilagecricoid cartilagethyroid cartilage