Why is the cell membrane described as semipermeable? A) It allows all molecules to enter and exit the cell.
B) It is used in photosynthesis and allows sugars to enter the bloodstream.
C) It is see through and scientists can view all cell activities occurring within the cell.
D) It allows only certain molecules to enter and exit the cell.

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.

How will you manage your time to accomplish the necessary tasks both on the job and at home?

Explain why ecosystem diversity results in species diversity in a healthy biosphere