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stealth61 [152]
2 years ago
13

What type of evolutionary mechanism did this story show?

Biology
1 answer:
Galina-37 [17]2 years ago
6 0

Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. Mutations are the ultimate source of new alleles in a gene pool. Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.

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identify the subcellular structure of the neuron that forms the basis for the transmission of nerve impulses. (2 points) describ
melisa1 [442]

The subcellular structures of neuron that forms the basis for transmission of nerve impulses are the synaptic vesicles.

What are the steps in impulse transmission between neurons?

  • The action potential or nerve impulse reaches the <u>axon</u> of neuron and depolarises the membrane.
  • Voltage gated Calcium channels open .
  • Arrival of action potential causes the synaptic vesicle to attach to presynaptic membrane.
  • Calcium influx triggers release of neurotransmitter.
  • This neurotransmitters bind to postsynaptic membrane and new impulses are created.

Synaptic vesicle under resting condition:

  1. The neurotransmitter molecules are stored in synaptic vesicles.
  2. If the neurotransmitter leak from the vesicles, they are destroyed by enzymes.
  3. During resting condition, they are placed randomly.
  4. When an impulse reaches the axon, vesicles are arranged in the presynaptic membrane.

Thus from the above we can conclude that, synaptic vesicles are the subcellular structures in transmission of nerve impulses and , under resting condition they are placed randomly.

To know more about transmission of nerve impulses :

brainly.com/question/840056

#SPJ4

4 0
1 year ago
Even though most plants are angiosperms, gymnosperms still have an advantage in certain environments. In what type of environmen
jeyben [28]

Answer:

gymnosperms are more successful around water bodies

3 0
3 years ago
Which is a physical property of milk?
torisob [31]
Liquid...............
3 0
3 years ago
Read 2 more answers
Neither signs nor symptoms appear in people with anaphylaxis when they
zysi [14]

Answer:

The answer to this question would be True.

Explanation:

The first time an allergen is introduced into your immune system, it triggers a response to create antibodies against the allergen. Only subsequent exposure to the allergen triggers anaphylaxis.

Hopefully this helped.

3 0
3 years ago
Which parts of the graph for it increase if all of earths polar ice melts? Which part would decrease?
tigry1 [53]
If the Earths polar Ice melts the ocean levels will increase because of the increased amount of water. Some peninsulas and islands would decrease because they would sink from the risen water.
5 0
3 years ago
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