Which of the following explains why water can support life below water? - Water is denser when frozen, protecting underwater organisms.
- Water cools and heats very quickly to protect aquatic ecosystems.
- Water can dissolve most substances in their solid, liquid, and gas form.
- Water cannot move against gravity; this keeps its molecules together.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

You are observing different types of cells in your science lab. one cell has many chloroplasts. what is the most likely function of this cell? a. energy production b. photosynthesis c. reproduction d. digestion