Intense heat at Earth's core creates
in the mantle, which in turn
leads to movement in the

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

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

If a checkpoint detects damaged dna, the checkpoint may