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ExtremeBDS [4]
2 years ago
6

Which gas was not present around the time earth first formed?

Biology
2 answers:
Solnce55 [7]2 years ago
4 0

Oxygen was not present around the time earth first formed. Hope this helps. :)

Kisachek [45]2 years ago
3 0
The answer would be A. Methane
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2) O DNA e o RNA são os quais se formam a partir de Estes são constituídos por um ácido fosfórico, um açúcar e uma base nitrogen
AysviL [449]

Answer:

E) Nucleic acids; nucleotides; deoxyribose; ribose; uracil; thymine.

Explanation:

Os dois tipos de ácidos nucléicos são DNA e RNA, eles são formados a partir de nucleotídeos. O açúcar no DNA é a desoxirribose, enquanto no RNA é o açúcar ribose. A sequência de bases nitrogenadas para o DNA é adenina, tiamina, cinina e gianina, enquanto para o RNA é uracila, cinina e gianina.

5 0
2 years ago
Glycolipids and glycoproteins function as ____ in the cell membrane.
Naily [24]
They form hydrogen bonds with the water cells so therefore strengthen the cell membrane. Hope this helped
3 0
3 years ago
Define the digestive system ​
lina2011 [118]
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion. Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body. The process of digestion has three stages
5 0
3 years ago
4. What cell part contains an organism's genome?<br> gene<br> ribosome<br> nucleus<br> nucleolus​
ratelena [41]

Answer:

Nucleus

Explanation:

The nucleus contains the DNA and RNA of the cell. It is the nucleus that carries the biological information for the person.

Hope this helps!

6 0
3 years ago
Which process is most responsible for the increase in early Earth’s atmospheric oxygen levels?
Alex
The answer is photosynthesis.

<span>Photosynthesis occurs in the leaves of green plants. During photosynthesis, carbon dioxide and water are converted into using the energy of sunlight to glucose and oxygen. After great evolution of plants, the photosynthetic rate was increased. More plants mean more oxygen produced in the process of photosynthesis. Thus, photosynthesis </span><span> is most responsible for the increase in early Earth’s atmospheric oxygen levels.</span>

3 0
3 years ago
Read 2 more answers
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