Question

in the space provided, write the letter of the term or phrase that best completes each statement or best answers the question. 1. life requires a. moderate temperatures, electromagnetic radiation, and hydrothermal vents. b. precipitation, sodium chloride, and phytoplankton. c. liquid water, temperatures between 10°c and 40°c, and a source of energy. d. gravity, algae, and bacteria. 2. where on earth are conditions suitable to most life located? a. in the mesosphere c. hydrothermal vents b. in the biosphere d. both (a) and (c) 3. phytoplankton are a. bacteria. c. plants on land. b. tiny marine algae. d. dead plants and animals.

Explanation:

1. Life requires liquid water for biochemical reactions, temperatures in a moderate range for enzyme - function and molecular stability, and a source of energy for metabolic processes.
2. The biosphere is the global sum of all ecosystems where most life on Earth is found. The mesosphere is too cold and has low - density air, and hydrothermal vents are specialized environments.
3. Phytoplankton are tiny marine algae that perform photosynthesis in aquatic ecosystems.

Answer:

1. c. liquid water, temperatures between 10°C and 40°C, and a source of energy.
2. b. in the biosphere
3. b. tiny marine algae.