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il63 [147K]
3 years ago
5

planet x is a terrestrial planet in our solar system it has 21% oxygen in its atmosphere humans can walk on this planet without

the aid of a space suit
Biology
2 answers:
andrey2020 [161]3 years ago
7 0
Yes humans can walk on this planet without aid from a space suit but it can still cause suffercation
Tasya [4]3 years ago
6 0

Answer:

Yes,  in its atmosphere(21% oxygen) humans can walk on this planet without the aid of a space suit

Explanation:

The atmosphere of the earth has a percentage of 20.946% similar to the planet x with 21% oxygen.

Most living forms depend on the air: oxygen is necessary for the breathing of human beings. In the first 100Km the oxygen composition in the atmosphere remains stable.

Humans are very sensitive to oxygen levels, the magnitude of the oxygen deficit can lead to death but 215 is a  bearable percentage.

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Answer:

30

Explanation:

The seed of an angiosperm is formed as a result of fertilization (fusion of sperm in pollens and the ova from ovary). According to the question, the cells of the seed which will grow into the plant contains 20 chromosomes. Seeds of angiosperms contain a tissue called ENDOSPERM that forms as a result of the unique DOUBLE FERTILIZATION in angiosperms. It occurs when one haploid sperm cell fuses with two haploid polar nuclei to form a triploid endospermic structure that serves as food for the growing embryo in the seed.

Now based on the above explanation, the diploid plant cell with 20 chromosomes will have 10 chromosomes (half as much) in its gametes as a result of meiosis. This 10 chromosomes in each gamete (sperm and ovum) fuses to form a diploid zygote with 20 chromosomes, while one haploid sperm cell (10 chromosomes) also fuses with two haploid polar nuclei (10 chromosomes each) to form a triploid endosperm with 30 chromosomes i.e. 10+10+10.

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