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stiks02 [169]
3 years ago
8

Which part of the plant cell provides protection and structural support

Biology
1 answer:
adell [148]3 years ago
6 0

Answer:

cell wall provides protection and structural support

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Why does evolution have to with change over time?
Naddik [55]
Evolution is the change in an animal over time. Evolution causes this one animal to branch out into many different species of animals.
How evolution starts- There is a mutation in the genes of one animal. If the mutation helps the animal, than the animal breeds and passes on this mutation. This is natural selection. Natural selection is the starting point of evolution because all of the helpful mutations get passed down to change the species over time for the animals' benefit.
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6 0
3 years ago
In the disease myasthenia gravis, the human body makes-by mistake- antibodies to its own acetylcholine receptor molecules. These
andre [41]

Answer:

Muscle contraction function.

Explanation:

The nerve endings possess synaptic acetylcholine vesicles ready to be released. The action potential depolarizes the presynaptic terminal and increases the concentration of axoplasmic calcium; Acetylcholine molecules are thus released, so that the concentration of the neurotransmitter at postsynaptic (nicotinic) receptors is temporarily increased. This is followed by post-synaptic membrane depolarization, muscle membrane action potential with increased rnioplasmic calcium concentration, and finally muscle contraction. Acetylcholine is hydrolyzed by acetylcholinesterase and resynaptic at the presynaptic level by cholinecetyltransferase. The etiopathogenesis of myasthenia gravis is autoimmune and there are antibodies against acetylcholine receptors that circulate in the blood, as well as a decrease in the number of receptors on the motor plates, that is, it is produced by the postsynaptic blockage of the myoneural plaque, that generates fatigue and localized or generalized muscle weakness that is characterized by the worsening of the contractile force of the muscle.

6 0
2 years ago
All cells make and process energy in the same way.<br> True<br> False
Alex

Answer:

false

Explanation:

5 0
1 year ago
Read 2 more answers
Question 15 (5 points)
-BARSIC- [3]

Answer:

Both Anti A and Anti B bodies are present in the blood stream of person with blood group O

I hope this will help you:)

7 0
3 years ago
Surface skin cells regenerate from stem cells found in which specific region?
vagabundo [1.1K]

Answer:

In the stratum basale.

Explanation:

The stratum basale is the deepest layer of the epidermis and the location of highly mitotic cells.

6 0
2 years ago
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