Answer:
If a neurotransmitter attaches to a ligand-gated channel and creates a potential that causes the inside of the excitable cell membrane to become less negative, and this potential travels only a short distance before dying out, it is considered to be a <u>Graded or local potential</u>
Explanation:
<em>Graded potentials, also known as local or generator, are generated by an excitatory neurotranmitter, usually a ligan gated channel</em>, they occur at a localized place on the cell and their potentials are smaller (from 1-50mV) and its magnitude depends on the strength of the stimulus.
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Answer: D
Explanation: The consumption of fish especially the small fish e.g shellfish is by far the most significant source of ingestion-related mercury exposure in humans and animals.
C human selection is the answer hope this helps
Hey,
I believe this answer is A: The desert plants are likely to be better at retaining water.
Which they do, and they have to cause water is very scarce in the desert unlike the rain forest.
Desert plants likely to be larger is not proven and most plants can vary in size.
Narrower stems may have something to do with it but that goes back to they have to hold more water so this is incorrect.
Brighter flowers doesn't have anything to do with water consumption within a plant so this is incorrect as well.
Hope this helps!
Brainliest is always appreciated if you feel its deserved.
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Natrual variations i think
