The na+-k+ atpase is a countertransport antiport carrier, which always requires energy.

Answer;

-The above statement is true

The Na+-K ATPase is a counter-transport antiport carrier, which always requires energy.

Explanation;

-The sodium-potassium (Na+-K) pump transports both sodium and potassium UP their concentration gradients in a process called active transport. Active transport involves the transport of Na+ from a place of low concentration to a place of higher concentration.

-Antiport is an Integral protein which moves two or more molecule types across the membrane in the opposite direction. while a symport is an Integral protein which moves two or more molecule types across the membrane in the same direction.

the answer is c. it will give up it's valence electron to the other atom.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.