What prevents the Na + and K + gradients from dissipating?

a. H+-K + ATPase

b. Na + and K + leaks

c. Na + cotransporter

d. Na+-K + ATPase

Which of these statements is correct about the Theory of Natural Selection? It was accepted after evidences were proved non-testable. It was proposed after several science magazines published it.

A mouse's tail gets cut off. If the mouse has babies later, how will this affect the length of the tails of its offspring? A. It depends on the length of the mate's tail. B. It will not affect the length of the tails of any of the offspring. C.

Over time Pangaea broke apart to form other continents. Which group of modern day continents composed Laurasia?

What constitutes a scientific name

When organisms convert forms of energy, what usually results? 1 All of the energy is converted into a usable form 2 Some of the energy changes into heat that escapes into the surroundings 3 All of the energy is changed into mechanical energy 4 Only

During the last century, both global temperatures and men's average height have increased. Do these correlated trends mean that the increase in men's height caused the increase in global temperature? yes ___ no ___ Explain why or why not.

Describe the different types of fossil fuels. What makes them nonrenewable?

As the number of rabbits in a community goes up, the number of foxes in the same community goes up. What type of relationship is this?

Which of the following locations would most likely have the most fertile soil

What are dna composed of?