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Mila [183]
3 years ago
6

For a species to be on the endangered list there must be ____ organisms of the species left.

Biology
1 answer:
pentagon [3]3 years ago
7 0
2,500 is correct in my opinion
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A scientist adds colchicine, a microtubule polymerization inhibitor, to a cell entering mitosis. At metaphase, the chromosomes o
defon

<u>Answer:</u>

<em>Colchicine is also known as mitotic poison. When it is added the separation of chromosomes of daughter cells are stopped. </em>

<u>Explanation:</u>

This is because the formation of spindle fiber is not allowed in the mitosis phase. Basically it is the process of arresting the mitosis at metaphase to study the chromosomes properly.

The addition of colchicine prevents the chromosomes to move to opposite poles. It makes the cell polyploidy. Hence the of addition of colchicine is the polyploidy of the cell.

7 0
3 years ago
Cells use vesicles to transport substances with?
Nuetrik [128]
<span>Vesicles are used to transport items in many different circumstances, so I'm not quite sure how to answer your question. Vesicles are used when transporting to and from the golgi apparatus, also when transporting molecules to lysosomes. They are even used when undergoing exocytosis. Basically, they are used to carry items/molecules/wastes around within cells

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8 0
3 years ago
Leaves have air spaces to allow for carbon dioxide and oxygen to move into and out of cells for photosynthesis, which causes wat
geniusboy [140]

Answer:

They have  helical thickening of lignin in their walls to prevent collapse

Explanation:

the primary function of Xylem and its conducting vessels tracheids is to provide  support and tranport  water and  minerals  in plants.

Xylem vessels  have layers of dead materials in the walls called LIGNIN.   Lignin is a polymer; a  very strong, hard materials that stop water passage  through it,because it contains dead cells,

Therefore  the presence of  deposit of these strong  impermeable, ligified  walls  in its  walls  prevent its collapse during mass flow of water of transpiration pull.

6 0
3 years ago
Why are liver cells a example of slow rate division
svlad2 [7]
Liver cell will divide slowly if the part of the liver remove cells, liver cells continues until to divide until the liver reaches its former size
6 0
3 years ago
How are respiration and photosynthesis related to each other?
Fittoniya [83]

Answer:

Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. ... While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide.

Explanation:

8 0
2 years ago
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