Plants absorb
for photosynthesis.
a. Oxygen
b. Carbon Dioxide
c. Nitrogen
d. Helium

B:Carbon Dioxide

Explanation:

plants take in carbon dioxide and create food for the plant and it also makes oxygen

B.Carbon

Explanation:

There waste product is oxygen and nitrogen and helium are not possible

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unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

the tricuspid valve is present between right atrium and right ventricle