Why does photosynthesis work better under red light? For 7th grade science.

Why do we perceive objects as retaining their brightness under different lighting levels?

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

Which feature would you expect to find in a population in which sexual selection depends on male competition?