Answer:
<u><em>DNA is made of repeating units called nucleotides.</em></u>
Explanation:
DNA can be described as a double helix molecule made up of long polymer chains of nucleotides. The nucleotides which are present in a DNA are:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T)
The hydrogen bonds which occur in the pairing of nucleotides makes the double helix structure of DNA.
Adenine forms hydrogen bonds with Thymine.
Guanine forms hydrogen bonds with Cytosine.
The backbone of the DNA is made up of sugars and phosphates
Answer:
C. Polar
Explanation:
The city Q is most likely to be present in the polar region. The polar climate regions do not have any warm summers. The average temperature in a polar region is predicted to be less than 10 °C. About 20% of the earth is known to have the polar climate. Annually, less than 25 cm rain or precipitation is noted in the polar region. Hence, the city Q is most likely to be located in the Polar region.
The answers are
23. D
24. C
Answer:
Artificial selection is the intentional breeding of plants or animals. It Bacically is the same thing as selective breeding and is an ancient method of genetic engineering. hope this helped!
Explanation:
