Which is a component of a phospholipid? O carbon ring
O hydrophilic head
O long-chaishualcohol
O amino acid

Hydrophilic head

Explanation:

The phosphate group is the negatively-charged polar head, which is hydrophilic.

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

yes we can.   a lady urinates from her urethra.