Question 21 (2 points) A scientist studies a model of a widely accepted theory about the position of planets and sun. The model would most likely help the scientist to demonstrate how the theory can be changed into a law understand facts which cannot be easily observed prove that all other facts about the universe are incorrect prove that the theory would not change in the future

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?

All phases of matter may have a fixed mass