Answer:
The Sun
Explanation:
it is essential to doing photosynthesis
That would be A.
Cells have specific receptors for different hormones that allow the intake of them.
Answer:
Estrogen levels days prior to ovulation
Explanation:
Estrogen is responsible for the reproductive system in women and high levels occur naturally during menstruation as compared to glucose levels in blood as the pancreas is constantly producing more insulin to lower the glucose in blood.
IDRK
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Answer:endocrine gland
Explanation: these are duct less glands
