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eimsori [14]
3 years ago
12

PLEASE HELP !

Biology
2 answers:
Leto [7]3 years ago
8 0
I do believe the correct answer is A good luck!!
Gala2k [10]3 years ago
4 0
I believe the answer would be A, because if water didn’t exist, there would be no presence of living things on earth. Water is a resource for life, thus, presence of living things.
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Help please <br>Biology ​
bagirrra123 [75]

Answer:

Complementary base pairing is the phenomenon where in DNA guanine always hydrogen bonds to cytosine and adenine always binds to thymine. The bond between guanine and cytosine shares three hydrogen bonds compared to the A-T bond which always shares two hydrogen bonds.

8 0
2 years ago
Could a mixture be made up of only elements
Tanzania [10]
Yes it can!
~ Hope this helps.
4 0
3 years ago
What are the causes of respiratory disorders such as bronchitis, pneumonia and lung cancer.?
Dovator [93]

<u>Smoking</u> causes respiratory disorders such as bronchitis, pneumonia and lung cancer.

<u>Explanation:</u>

Respiratory disorders such as bronchitis, pneumonia and lung cancers are caused by smoking tobacco, air pollution and by infection. Smoking is the predominant cause of this respiratory order it also raises the level of air pollution which becomes hazardous to all the living organisms.

Infection in the lungs which is identified as pus in air sacs and found as inflamed lungs is usually life threatening. Severe shortness of breathe called the bronchitis is due to airborne chemicals.

5 0
3 years ago
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____ [38]

Answer:

The reactivity greatens the farther you go down on the periodic table. Lithium will have the weakest reaction, and cesium will have the greatest reaction. Patterns like this are useful to scientists because it shows which elements are the most reactive and which aren't. The farther down and to the left you go within the periodic table, the more reactive the elements become. The farther up and to the right you go, the less reactive they become.

Explanation:

5 0
3 years ago
What kinds of traits do not evolve through natural selection?
Harrizon [31]

Natural selection doesn't favor traits that are somehow inherently superior. Instead, it favors traits that are beneficial (that is, help an organism survive and reproduce more effectively than its peers) in a specific environment. Traits that are helpful in one environment might actually be harmful in another.

(one again, I hope this helps ^^)

8 0
3 years ago
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