A train-car is to a train as a
type here
is to a polymer
and a molecule is to a
type here

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

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.

What characteristic make legumes a good food source for food insecure populations