The probability of flipping a coin twice and getting heads

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.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions