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Alona [7]
3 years ago
7

The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of _____.

Biology
1 answer:
jok3333 [9.3K]3 years ago
7 0
<span>The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of </span>calcium ions.

Slow-block to polyspermy is also called cortical reaction. In this reaction, the sperm will be permanently blocked by cortical granules. The release of calcium ion will trigger this reaction.
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A series of hollow organs joined in a long, twisting tube from the mouth to the anus.​
natita [175]

Answer:

The digestive system!

Explanation:

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Organs that make up the digestive tract are the mouth, esophagus, stomach, small intestine, large intestine - also called the colon - rectum, and anus.

6 0
3 years ago
Which best describes the cell theory
Neko [114]
Each cell is alive even if it is part of a multi celled body, and all living organisms consist of one or more cells. Also, cells reproduce by dividing so it follows that all existing cells must have arisen by division of other cells. As a cell divides it passes it hereditary material- its DNA- to offspring.
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3 years ago
Which is the best example of a eukaryote?​
Hitman42 [59]

Answer:

A

Explanation:

Eukaryotic cells have the nucleus enclosed within the nuclear membrane.

The cell has mitochondria.

Flagella and cilia are the locomotory organs in a eukaryotic cell.

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3 0
1 year ago
Explain why identifying
inna [77]

Answer:

<u><em>It is because humans have much larger genomes than bacteria</em></u>

<u><em /></u>

Explanation:

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<em>If you found my answer helpful, then please do me a favor by marking me as the brainliest as it means a lot to me.</em>

<em></em>

<em>From a fellow student,</em>

<em>Good day ahead, :)</em>

<em>Dan</em>

8 0
2 years ago
Plants play a crucial role in the carbon cycle because they ?​
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Photosynthesise. They take in carbon and use it to make glucose and oxygen.
5 0
3 years ago
Read 2 more answers
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