A bacterium is made of a single cell; the human body coordinates that activities of tens of trillions of cells. In what way are cells alike? A. the structures they contain
B. Their size and shape
C. the specific functions they serve within a system
D. their ability to perform basic life functions

explanation:

crosscutting concepts have application across all domains of science. as such, they are a way of linking the different domains of science. they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.

b) mutualism

hope this : )

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.