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Lostsunrise [7]
3 years ago
15

Name for large bases containing two carbon-nitrogen rings

Biology
1 answer:
bazaltina [42]3 years ago
7 0
Purine and pyrimidine
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2 years ago
Scheiden and Schwann stated what important principle of biology, equal in weight to the Atomic theory of chemistry?
ivanzaharov [21]

Answer:

B

Explanation:

Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.

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The respiratory system branches like the circulatory. Oxygen and carbon dioxide diffuse between the end of these branches and th
Feliz [49]

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1. Ends of the respiratory branches are called alveoli.

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Explanation:

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CAN YOU GUYS HELP ME PLEASE ITS URGENT !!!! ( 15 points !!! )
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C.

Because plants reproduce like humans. It may seem like it is the wrong answer but it is right. I learned this in eighth grade my guy.

Explanation:

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