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kompoz [17]
3 years ago
13

8.

Biology
1 answer:
prohojiy [21]3 years ago
8 0
Hopes this helps:

Answer: food webs
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The fact that individuals who possess favorable traits are more likely to survive and reproduce than those who possess less favo
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Natural Selection, as described by Charles Darwin
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Give an example of a non-testable question:
Charra [1.4K]

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a non testable question can be, what is better, chips or ice cream?

Explanation:

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What secretion helps waste to move through the large intestine?
Aleksandr-060686 [28]

Answer:

I'm almost certain that it's mucus. (been a hot sec since I took a bio or anatomy class)

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Here's a quote: "The colon secretes mucus to bind and lubricate the food waste to help it pass through smoothly as it is dehydrated." -the Cleveland Clinic

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2 years ago
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
3 years ago
DNA<br>"Deoxyribonucleic<br>Acid"​
Zarrin [17]

Answer:

Details about DNA are given in the explanation section. Hope it will be helpful for you.

Explanation:

DNA, or deoxyribonucleic acid, is the hereditary element in humans and almost all other organisms. Nearly every cell in a person’s body has the same type of DNA. Most DNA is found in the cell nucleus (nuclear DNA), but a small quantity of DNA can also be found in the mitochondria (mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same type in all people.

DNA bases pair up with each other, A with T and C with G, to form units that are called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule.  A base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

A valuable feature of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases.

7 0
3 years ago
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