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Mandarinka [93]
3 years ago
12

What is the main function of the nucleus and why

Biology
1 answer:
AlladinOne [14]3 years ago
4 0

Answer:

it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.

Explanation:

nly the cells of advanced organisms, known as eukaryotes, have a nucleus.

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Giving brainiest 5stars and tys and a follow ty
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TAGGCTGGTCGAT, or B.

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3 years ago
Which of the following statements about resting potential is true? A resting membrane allows much more sodium than potassium to
AleksAgata [21]

Answer:

The sodium-potassium pump contributes to the resting membrane potential.

Explanation:

This is the stage in which the neuron is not depolarize. 3Na+ are pumped outside  through  the sodium  channels, while  K+ channels are open for2 K+ to enter the cells.After some time the Na+ channels closed up. However some K+ channels still leaks , so that K+ still escape out of the cells to the external environment ,which contains more of Na+. Therefore at this stage there are more Na+ outside the neuron compare to the inside the neuron. Therefore the inside of the neuron is negative , because more K+ are leaving the cells, leaving negatively charged anions inside, and the outside is positive  due to more Na+ are outside, and because the K+ leaking outwards.

The regulation of the Na+ and K+ ions movements is regulated by sodium potassium pumps along the membrane of the neuron. if the potential at this stage is measured, it has a value of -70mv, and it is called membrane potential.

4 0
3 years ago
An organ system is made up of
ludmilkaskok [199]

Answer:

A

Explanation:

Organs are the body's recognizable structures (for example, the heart, lungs, liver, eyes, and stomach) that perform specific functions. An organ is made of several types of tissue and therefore several types of cells.

4 0
3 years ago
Identify the tissues and write their main functions 9 to 11 carries three marks each<br>​
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Explanation:

The cell wall proctects the cell while the membrane forms structures inside of the cell

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