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sp2606 [1]
3 years ago
6

Menopause normally occurs between the ages of forty-five to fifty-five, but can be induced prematurely by which procedure?

Biology
1 answer:
Nastasia [14]3 years ago
5 0
A hysterectomy allows one to start menopause early.
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using the process of bacterial transformtion, a student reseacher inserted a plasmid containing a gene for antibiotic resistance
Elena-2011 [213]

Transfer of newly created plasmids to e coli. The bacteria that contains a plasmid with antibiotic resistance will grow in the presence of antibiotic concludes that the insertion was successful.

<h3><u>Explanation:</u></h3>

The plasmid DNA that contains the foreign DNA when integrated with the competent bacteria which is e coli and heated,  plasmid DNA will be entering into the bacteria by means of some smaller pores that are created in the  membranes of the cell.

The plasmid DNA will be copied many times with the help of the replicating mechanism of DNA of the bacteria. Bacteria will grow on a nutrient rich food called agar after the transformation process. Those bacteria that contains a plasmid containing antibiotic resistance only grow in the antibiotic presence. Transformed bacteria will then grow in larger quantity.

4 0
3 years ago
What process would be necessary for the movement of calcium ions from areas with low concentrations to areas with high concentra
marysya [2.9K]
Active transport is the process that would be used to transport calcium ions through the calcium pump. 
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4 years ago
Why does the rate of heart beat increases during exercise?
kherson [118]

During exercises, our muscles needed energy for contractions. The heart pumps more rapidly and more powerfully during this time for a few reasons.


First, more oxygen and nutrients like glucose can be transported to the heart. Muscle cells uses oxygen and glucose for aerobic respiration to generate energy.


Secondly, more carbon dioxide and waste can be transported away from the muscles. Waste products from aerobic respiration includes carbon dioxide or water etc. The faster the heart pumps, the faster the blood gets transported so more waste can be carried away.


Thirdly, lactic acid can be carried away too. When oxygen supply is not enough, the cells undergo anaerobic respiration to generate energy. This type of respiration does not require oxygen, but a waste product called lactic acid is produced. Lactic acid must be carried away from cells because they're harmful. Therefore, the faster the heart pumps, the more lactic acid gets carried away.


Last but not least, heat can be carried away too. Part of the energy generated is turned into heat. Therefore, in order to help us cool down, blood travels fast to carry heat away from the heat generating muscle cells.

5 0
3 years ago
Read 2 more answers
Which of these correctly orders the structures through which air passes during inhalation?
Svetllana [295]

Answer:

pharynx, larynx, trachea, bronchi

Explanation:

During the inhalation through the nose or mouth the air first enters the "pharynx" which is also called as throat,

then the air moves towards the "larynx" . Is a passage between the pharynx and the trachea

Through larynx the air then moves toward the "trachea". It is passage connecting the larynx and the bronchi

and then the air inhaled reaches to the "bronchi" of lungs.

hence, the correct order is "pharynx, larynx, trachea, bronchi"

3 0
3 years ago
Which strategy is NOT used in conservation biology? A. Habitat preservation c. Habitat degradation b. Species protection d. Habi
-Dominant- [34]
C habitat degradation
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