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Mekhanik [1.2K]
2 years ago
12

Which stars spend the least time in the main sequence stage?

Biology
1 answer:
Amiraneli [1.4K]2 years ago
6 0

Answer:

Type B stars

Explanation:

type B stars are the hottest, so they would burn up more quickly, spending the least amount of time on the main sequence.

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Woolly mammoths became extinct thousands of years ago, while other species of mammals that existed at that time still exist toda
Kamila [148]

Answer:

faced a struggle for survival

Explanation:

The woolly mammoths became extinct, unlike the other species, because the woolly mammoths faced a struggle for survival due to changing of environmental conditions. Global warming is the main cause of extinction of woolly mammoth which destroy their habitats about 10,500 years ago. The environmental conditions are not favourable for them so they faced struggle for survival which causes extinction of woolly mammoth.

8 0
3 years ago
How does the enzyme dna ligase contribute to dna replication?
leva [86]
DNA ligases close nicks in the phosphodiester backbone of DNA. Biologically, DNA ligases are essential for the joining of Okazaki fragments during replication, and for completing short-patch DNAsynthesis occurring in DNA repair process. There are two classes of DNA ligases.
6 0
2 years ago
5. What two systems are primarily involved in processing food? *
quester [9]

B and D

hoped i helped

6 0
3 years ago
The scientists modified the genes that were turned on/off (expressed) in mice. What happened to the offspring of these mice?
daser333 [38]

The resulting mice will be induced with the changed gene either on or off. The offspring will have altered genes if both the alleles have the trait. This is a heritable change.

Explanation:

Making gene on or off is a process of gene regulation when one of the gene is methylated or histone modification to prevent access to transcription factors hence no expression of the protein. This process is called epigenetics.

The resulting progeny in mice will receive the allele of on or off the gene. Such genes with altered allele are also called as

The altered genes will be expressed in the resulting progeny of mice.

The epigenetic genes can be reverted with environmental effects in the offspring paramutable alleles. They are heritable.

6 0
3 years ago
The inability of the body to adequately circulate blood and oxygen to the body's cells is known as
Arada [10]
Circulation of the blood is crucial in the body since it helps in supply of nutrients and oxygen to all parts of the body. It is these nutrients and oxygen that are key in the activities of a cell or a tissue without which the cells wont efficiently carry out their functions.The inability of the body to supply blood and oxygen to the body cells as required is known as hyperfusion. Hyperfusion is caused by inadequate perfusion of the body tissues and thus resulting to inefficient supply of nutrients and oxygen gas to the body cells and tissues.
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3 years ago
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