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kari74 [83]
3 years ago
15

How many tigers are left in the world?

Biology
1 answer:
satela [25.4K]3 years ago
5 0
There are an estimated 3200 tigers left in the wild. 2-According to WWF there are more tigers (between 5000 and 7000 tigers) living in captivity in the USA than in the wild. 3-In the USA, there are no federal laws regulating the possession of exotic animals.
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Oxidative damage to DNA can often result in the alteration of a single nucleotide.
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Answer:

Repair mechanism for base cleavage (BER)

Explanation:

Repair by base cleavage (BER)

The altered bases are specifically recognized by glycosylases and removed, generating an AP site. The hole is filled by a DNA polymerase that takes the healthy strand as a template. This system arises not only by exposure to external agents, but also by the cell's own activity.

In case of damage in more than one nucleotide, repair by nucleotide excision (NER) is performed.

Nucleotide excision repair (NER)

The damaged area is recognized by UvrA and B, then A and B separate and UvrC enters which forms a complex with endonuclease activity with B. This enzyme cuts the T-dimer and the gap is filled by a DNA polymerase. There is also the TC-NER system (transcription-coupled nucleotide repair system). The alteration of these mechanisms gives rise to diseases such as: Xeroderma pigmentosum, Trichotiodystrophy or Cockayne Syndrome

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3 years ago
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Leukemia can be treated using human stem cells to attack and destroy cancer cells.

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3 years ago
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The biotic elements of an eco system include all of the following except?
Brut [27]

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3 years ago
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Peat contains acids that can help fight diseases.<br> True<br> False
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Answer:

false

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The reason why its false is because a person can't fight diseases with acids. there is something your body has called Antibodies. Also acid would only make it worse

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3 years ago
Which of he following events represents a disruption in access to the energy source needed by an organism
yawa3891 [41]
Thank you for posting your question here at brainly. Below are choices that I manage to check from other sources:

A. A weed is uprooted from the soil. 

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D. The water bowl is removed from a hamster’s cage.


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