While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. The organelles that most directly provide this energy are known as

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.