Explanation:
Variations in the sun's energy reaching Earth
Changes in the reflectivity of Earth’s atmosphere and surface
Changes in the greenhouse effect, which affects the amount of heat retained by Earth’s atmosphere
Answer: Food storage and secretion
The parenchyma cells in the plant tissues typically composed of living cells that are thin walled, unspecialized in structure, these cells differentiate to perform various functions. In plant cells the function of the parenchyma cell is food storage and secretion.
Anaerobic metabolism requires oxygen
They produce food with energy from the sun