Answer:
Sympatric speciation
Explanation:
There may be more than one answer here, but concerning speciation, sympatric speciation can't occur because of the geographic isolation (must be living in the same environment for this to occur).
The answer is C. Compact tissue hope this helps :)
Answer:
Action potential in a motor neuron triggers the release of acetylcholine (ACh) neurotransmitter.
Explanation:
Acetylcholine: It is a neurotransmitter released by motor neurons which bind to the receptors end plates of the motor. When an action potential travel down the motor neuron's axon, neurotransmitter release occurs resulting in an influx of calcium and altered permeability of the synaptic terminal membrane.
The Ca2+ ions allow synaptic vesicles to move and bind with the presynaptic membrane which is present on the neuron and released neurotransmitter from the vesicles into the synaptic cleft. Once it's released ACh diffusion occurs across the synaptic cleft to the motor end plate, and binds with ACh receptor. As the neurotransmitter ACh binds, these ions channel open and sodium ions cross the membrane into the muscle cells.
In this phase reduction of voltage inside and outside the cell occurs, which is known as depolarization. When ACh binds to the motor end plate this depolarization is known as end plate potential. Then depolarization spread with the sarcolemma and creating an action potential. This action potential moves the entire cell and creating a wave of depolarization.
Answer:
D
Explanation:
Virchow's work is based off of that living things cannot exist without there being previous living things. Therefore, it has to be D because all new cells must come from currently living cells
<span>Meteorology is BEST defined as the study of weather and climate.</span>
