Answer:
Together these reactions allow cells to make and store energy and help regulate atmospheric concentrations of carbon dioxide and oxygen.
Explanation:
Photosynthesis and cellular respiration are complementary biochemical reactions. Photosynthesis requires the products of respiration, while respiration requires the products of photosynthesis. Together these reactions allow cells to make and store energy and help regulate atmospheric concentrations of carbon dioxide and oxygen.
For number 1 the answer is B
For number 2 the answer is C
Abiotic components are non-living chemical and physical factors in the environment which affect ecosystems. Biotic describes a living component of an ecosystem; for example organisms, such as plants and animals.
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