Which of the following does the endocrine system regulate? a. blood sugar b. reflexes c. respiration d. senses no guessing!

Blood sugar.

Explanation:

The level of sugar in blood is controlled by the help of two hormones insulin and glucagon. There two hormones that controls the level of blood glucose in the body.

When the blood glucose level is more than normal then insulin is released from pancreas to make it normal.

When the Glucose level is less than normal then glucagon helps to elevate the level of blood glucose to make the level normal.

Hence, the correct answer is Option A

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both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.