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Novay_Z [31]
3 years ago
12

In angiosperms, each pollen grain produces two sperm. what do these sperm do?

Biology
1 answer:
malfutka [58]3 years ago
3 0
In angiosperms, one sperm will need to fertilize the actual egg, while the other will need to fertilize the endosperm. 
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olga_2 [115]

Answer:

Users encounter the error message ‘The Third-party INF doesn’t contain Digital Signature Information’ when they are trying to install third-party drivers on their computer. There are usually two types of drivers present i.e. third-party (these are not developed by manufacturers) and official drivers

7 0
3 years ago
Which of the following is a characteristic of vitamin D nutrition?​a.​Pigments in dark skins increase vitamin D synthesis. b.​On
Anvisha [2.4K]

Answer:

b.​ Only about one-half of the world's population relies on sunlight to maintain adequate vitamin D nutrition  

Explanation:

Dark skin pigments slow down the synthesis of vitamin D, so black people need to spend more time in the sun to absorb enough vitamin D, so the letter A is incorrect.

Prolonged exposure to sunlight degrades the precursor of vitamin D, whereas prolonged exposure to sunlight produces vitamin D3, which acts to regulate heart function and blood pressure.  With this we can conclude that the letter C is also incorrect.

Vitamin D deficiency is not caused by calcium deficiency, on the contrary, vitamin D deficiency is a cause of calcium deficiency. In addition, summer vitamin D synthesis stocks are usually not sufficient to meet summer vitamin D requirements. That is why the letter D is also incorrect.

We can conclude, then, that the correct answer is the letter B. The main source of vitamin production is through sun exposure, because type B ultraviolet rays (UVB) are able to activate the synthesis of this substance. Some foods, especially fatty fish, are sources of vitamin D, but the sun is responsible for 80 to 90% of the vitamin the body receives. It can also be produced in the laboratory and given as a supplement when there is a deficiency and for the prevention and treatment of a variety of diseases.

5 0
3 years ago
Need help with this check smart people answer this fast
DENIUS [597]

Answer:

her arms are puffy red and swollen

Explanation:

These are physical signs (symptoms) that show that the girl may have an allergic reaction. Hope this helps

4 0
3 years ago
A spike in the popularity of Snapper fish in American restaurants causes a sharp increase in Snapper fishing. How will this affe
Delvig [45]

A spike in the popularity of Snapper fish in American restaurants causing a sharp increase in Snapper fishing will result in the number of Nassau grouper to increase.

<h3>What is the relationship between  Snapper fish and Nassau groupers?</h3>

The Snapper fish and Nassau groupers are two types of fishes which are fished for their delicious meat.

Both are found in fish markets where they are important delicacies especially in grilled fish.

An increase in the population of one fish will result in more fishing and hence an increase in the population of the other fish.

Therefore, a spike in the popularity of Snapper fish in American restaurants causing a sharp increase in Snapper fishing will result in the number of Nassau grouper to increase.

In conclusion, the popularity of one fish over the other will affect the population of the other fish.

Learn more about snappers and groupers at: brainly.com/question/12631476

#SPJ1

5 0
2 years ago
Plssssssss help <br>No Links ​
artcher [175]

Answer:

right

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3 years ago
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