What is the smallest part of an element that still retains properties of that element?
a.
atom
b.
compound
c.
mixture
d.
molecule

Models are non-visual ways of coummincating how someone thinks about something in the natural world

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.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.