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madreJ [45]
3 years ago
9

HELP!!!!! PLEASE

Biology
1 answer:
Kryger [21]3 years ago
6 0

Answer:

D

Explanation:

The molecule of DNA contain deoxyribose as the backbones and guanine is one of the four bases that attached to each sugar.

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Food chains show a single path of energy in an ecosystem, and food webs show all the overlapping food chains in that ecosystem. Food webs show the path of energy in an ecosystem, and food chains show the path of nutrients in that ecosystem

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<u><em>The "Lungs" are pairs of organs within the rib cage.</em></u>

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Answer:

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The oxygen (O₂) required by the tissues comes from the air inspired by the respiratory system. The pathway of entry of O₂ to the body and tissues is:

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<em>     The other options do not show the correct order in which the oxygen travels from the alveoli to the tissues.</em>

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RNA brings instructions to make cellular proteins out of the nucleus to the
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