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77julia77 [94]
3 years ago
6

Which statement is true of DNA?

Biology
1 answer:
Illusion [34]3 years ago
8 0

Answer:

A purine always forms a complementary base pair with a pyrimidine.

Explanation:

Purine bases such as Adenine pair specifically with Thymine , a pyrimidine base forming two bonds; just as Guanine pair specifically with Cytosine forming three bonds.

This specific base pairing are complimentary in nature and grants stability to the DNA.

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How does ovolution lead to both biodiversity and commonalities among<br> life?
Doss [256]

Answer:

Evolution leads to biodiversity by changing the genetic code of organisms. When evolution leads to biodiversoty its called natural selection. It slowly decreases the popluation of organisms that are less adapted to survive in the world, and increas the population of more strong and adaptable organisms.

For example if there is a pink bird and a white bird, the white bird's population will increase due to its adaptation of camoflauge, and the pink bird will die out because it will be spotted by predators easily. Therefore the species of the white bird will become more common

Explanation:

3 0
3 years ago
Which was not developed in the 1800s?
Charra [1.4K]

Answer:

Scientific method is not developed in the 1800s

7 0
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One idea to mitigate the effects of burning fossil fuels on atmospheric CO2 concentrations is to pipe liquid CO2 into the ocean
Cloud [144]

Answer:

Option E, Both increased acidity of deep waters and changes in the growth of bottom-dwelling organisms with calcium-carbonate shells

Explanation:

When high concentration of CO2 is pumped into the ocean at its greater depths, CO2 is absorbed extensively by the ocean which changes the pH of ocean water and makes it more acidic. The high acidity of ocean water is due to the release of free hydrogen ions. Excess of hydrogen ions make the carbonate ions less abundant due to which the organism that make carbonate shell will suffer as they may not get sufficient carbonate ions to calcify their outer coverings.  

Hence, option E is correct

4 0
3 years ago
Sorry if it is blury please help and hurry
algol [13]

Answer:It is too blurry for me to read please make another question with better quality and i will help you the best i can-Lucy have a nice day

Explanation:

7 0
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Andrew [12]

Answer:

Contagioso

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Por relaciones sexuales vaginales, anales u orales sin protección

Explanation:

<em><u>E</u></em><em><u>SPERO </u></em><em><u>TE </u></em><em><u>SIRVA</u></em><em><u> </u></em>

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