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Elza [17]
3 years ago
5

What is the original source of energy for most living organisms?

Biology
2 answers:
Basile [38]3 years ago
8 0
The sun is the original source of energy to living organism
KonstantinChe [14]3 years ago
6 0
Sunlight is the original source of energy for most living organisms.
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Biology, just one question, will mark as brainliest.
valentinak56 [21]
Your answer is C.) The hydrogen bond between complementary nucleotides

Those rectangles are nucleotides, and the nucleotides are held together by hydrogen bonds.

Hope this helps!
8 0
3 years ago
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A zygote is related to a blastocyst by the process of
ohaa [14]
By the process of meiosis
4 0
3 years ago
Which of the following statements about excision repair is correct?
maxonik [38]

Answer:

a. True, b. False, c.True, d. True

Explanation:

a. Base excision repair is started by a DNA glycosylase  that recognizes the changes and removes the altered base by cleavage of the glycosidic bond binding the base and the deoxyribose sugar together.

b. Nucleotide excision repair works by a cut-and patch mechanism that removes their heavy lesions, including pyrimidine dimers and nucleotides . Endonucleases are responsible for the lesion of the damaged strand.

c. Nucleotide excision repair  is initiated by the proteins namely UvrA, UvrC, and UvrB in Escherichia coli.

-UvrD (helicase II) later removes the damaged strand

-DNA polymerase I (PolI) fills in the resulting gap.

d. DNA glycolases removes the damaged nitrogenous base.

-It leaves the sugar-phosphate backbone intact and thus creating an  apurinic/apyrimidinic site, which is commonly referred to as an AP site.

e. Xeroderma pigmentosum complementation group A(XPA)

-This is an essential protein in the nucleotide excision repair pathway.

- It helps to make a pre-incision complex along with other proteins.                

4 0
3 years ago
How are cubs raised within a pride
Molodets [167]
All the lactating females in a pride suckle cubs showing no favoritism for their own offspring. The reason for this is that each lioness is enhancing her own genes' success by helping to raise her sisters' offspring. Mothers give birth to up to 6 cubs at a time but litters of 2 or 3 are more common.
Hope this helped.
3 0
3 years ago
Which method is often used in the disposal of medical waste?
DIA [1.3K]

medical waste is most often collected in biohazard bags or containers and incinerated. The heat kills bacteria and other pathogens that would re-infect surfaces, and workers.

6 0
3 years ago
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