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I am Lyosha [343]
3 years ago
5

Which of the following processes begins when a star enters the main sequence?

Biology
2 answers:
guajiro [1.7K]3 years ago
7 0

Answer:

Nuclear fusion is a correct option

Explanation:

Nuclear fusion processes begin when the star enters the main sequence.

Nuclear fusion: by which energy is produced by the star,the star become the main sequence star and it gets turned on.

Formation of a star takes place when it is very hot, hydrogen atom fuse to form helium in the core region,and energy is released by the fusion process and star enters the main sequence by the processes nuclear fusion.

This fusion results in outward pressure which balances the inward pressure, which is caused by gravity and thus stabilizes the star.

Thus Nuclear fusion processes begins when a star enters the main sequence.

Katena32 [7]3 years ago
6 0

Hello there Jonnromeroo, thank you for asking a question here on Brainly!

You Asked ➤ Which of the following processes begins when a star enters the main sequence?

↴ OUR CHOICES ↴

A: Nuclear fission

B: Nuclear fusion

C: Condensation of a nebula

D: Appearance of a supernova

------------------------------------------------------------------------------------

Answer ➤ B: Nuclear fusion

Explanation: When a star begins the process of being created, it is hot and dense. Really hot and dense! It begins to start fusing with helium which is the start of its main sequence called nuclear fusion.

I hope this answer is helpful to you, but please let me know if you have any other questions regarding it.  

<em>- Qamar  </em>

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Answer:

The probability of their first child being colourblind is 1/4

Explanation:

Red-green color blindness is an X-linked recessive disorder.

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In an X-linked condition, the males only need to get one copy of the affected allele to have the condition and this copy is also inherited by a female offspring.

So in this case, the woman receives the affected recessive allele copy from her dad but since she still has normal vision, she received the normal copy from her mom so she is heterozygote for the trait.

The woman with normal color (XRXr) has a father who is color blind (XrY) has children with a normal man (XRY)

The cross would be

XRXr x XRY

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