Photosynthesis must occur for plants to survive. Which of the following best explains why photosynthesis is necessary? A. Photosynthesis produces the water that plants need to survive. B. Photosynthesis releases carbon dioxide as a waste product. C. Photosynthesis allows plants to use the energy stored in food. D. Photosynthesis produces the food that plants use to grow.

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

What is special about a dc circuit ?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.