This is extremely vague, but assuming this is regarding concentration gradient in the nervous system, the Sodium-Potassium pump is responsible for transporting sodium and potassium.
Radioisotopes tell scientists that the earth is 4.5 billion years old.
Answer: " erythrocyte sedimentation rate (ESR) " .
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Hope this helps!
Best of luck!
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Some fruits—for example, the dandelion—have hairy, weightless structures that are suited to dispersal by wind. Seeds dispersed by water are contained in light and buoyant fruit, giving them the ability to float. Coconuts are well known for their ability to float on water to reach land where they can germinate.
