In salt water fish, chloride cells in the gills: a. passively transport Cl- from the ECF to the external environment. b. actively transport Cl- from the external environment to the ECF. c. actively transport Cl- from the plasma to the ECF. d. actively transport Cl- from the ECF to the external environment.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

genetic variation will increase because of a new habitat and food source.

explanation:

ever get the answers? im stuck on this as well

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.