Neurons are cells of the nervous system. As part of its normal function, a neuron pumps sodium ions (Na + ) out of the cell and potassium ions (K + ) into the cell. Which statement describes the role of energy in this process?

a. The process releases energy that is used to make ATP.

b. The process releases energy in the form of heat.

c. The process requires energy that is provided by the sodium and potassium ions.

d. The process requires energy that is provided by ATP.

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This rapid change in species that rarely leaves behind fossil evidence is referred to as

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time

(me out over the last several centuries, scientists have made the following broad observations while investigating several branches of the life sciences: -the fossil record shows that different types of organisms have existed at different times in earth's history. -many organisms have similar body structures that seem to be adapted to different ways of living in their environment. -organisms of different species often share similarities in stages of embryonic development. -many species share genetic similarities, and almost all organisms use the same basic building blocks to construct proteins. -often, the extent of two species' similarities can be predicted from their geographic closeness to each other. -a great deal of change has been observed among species that have experienced strong selective pressures through many generations. scientists have carefully considered and rigorously tested the observations listed above. when scientists offer a of these observations, they are making 1.) testable explanation, deductive explanation 2.) scientific interference, scientific law