Trees start from a seed having a biomass less than 1 gram and can grow into a ma

Question

Trees start from a seed having a biomass less than 1 gram and can grow into a mature plant containing over 1 metric ton of dry biomass. Which process contributes the most to this large increase in dry biomass as the tree grows from a seed into a mature tree?

a. absorption of mineral nutrients from the soil via roots

b. absorption of organic compounds from the soil via roots

c. incorporation of carbon dioxide gas from the atmosphere into compounds via leaves

d. incorporation of water from the soil via roots

Explanation / Answer

Answer is c. incorporation of carbon dioxide gas from the atmosphere into compounds via leaves.

Trees start from a seed having a biomass less than 1 gram and can grow into a mature plant containing over 1 metric ton of dry biomass. Incorporation of carbon dioxide gas from the atmosphere into compounds via leaves contributes the most to this large increase in dry biomass as the tree grows from a seed into a mature tree. Carbon dioxide in atmosphere contains 0.04 % and this carbon can increase the biomass of tree.

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