Question

16
chemical equation for photosynthesis
water + carbon dioxide → glucose + oxygen
h₂o + co₂ → c₆h₁₂o₆ + o₂
plants absorb water through their roots from the ground
co₂ from the air. animals exhale co₂
glucose is chemical energy, or food
oxygen is a waste product. the plant does not need oxygen so it releases it into the air for air to breathe
chemosynthesis
6co₂ + 12h₂s → c₆h₁₂o₆ + 6h₂o + 12s
how is chemosynthesis different than photosynthesis? select 2 answers from your choices below
a only chemosynthesis can occur without sunlight
b only photosynthesis can occur without sunlight
c only photosynthesis produces o₂ as a product at the end of the reaction.
d only photosynthesis produces h₂o as a product at the end of the reaction.

Explanation:

• Option A: Photosynthesis requires sunlight (as shown in the photosynthesis equation with the sun symbol). Chemosynthesis, on the other hand, does not rely on sunlight. It uses chemical energy (e.g., from hydrogen sulfide in the given chemosynthesis equation \(6CO_2 + 12H_2S

ightarrow C_6H_{12}O_6+6H_2O + 12S\)) instead of light energy.

• Option C: Looking at the photosynthesis equation \(H_2O+CO_2

ightarrow C_6H_{12}O_6 + O_2\), oxygen (\(O_2\)) is a product. In the chemosynthesis equation \(6CO_2 + 12H_2S
ightarrow C_6H_{12}O_6+6H_2O + 12S\), sulfur (\(S\)) is a by - product instead of oxygen.

Answer:

A. Only Chemosynthesis can occur without sunlight, C. Only Photosynthesis produces \(O_2\) as a product at the end of the reaction.