Answer:
A Carbon Dioxide
Explanation:
If CO2 is not availabe photosynthesis will not take place.
Hydrogen, Nitrong and CO(carbon monoxide) are not needed at all for photosynthesis
Answer:
The process of mitosis generates new cells that are genetically identical to each other. Mitosis helps organisms grow in size and repair damaged tissue.
Explanation:
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Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.