A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. Neurotransmitters bind to the membrane of the dendrite
Answer:
A. active transport
Explanation:
active transport is the movement of a substance across a membrane against its concentration gradient.
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I believe (Don't forget i'm just a beginner) That it would be around 45% as it wouldnt be 50 50 so around 45% would be my answer.
