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tere tere
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7 years ago
Why isn't the endometrium shed during a pregnancy?
 
  What will be an ideal response?

Question 2

A mature ovule includes the embryo sporophyte, its reserves of food, and the seed coat. This is collectively called:
 
  a. a fruit
  b. a seed
  c. a spore
  d. the endosperm
  e. an ovary
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#1
7 years ago
Answer to q. 1

The endometrium requires both estrogens and progesterone to be maintained. During a normal menstrual cycle, these two hormones participate in a negative feedback loop that stops the release of the gonadotropins FSH and LH, which in turn stops the production of estrogens and progesterone. During a pregnancy, this feedback loop is bypassed. The chorion, and later its mature form, the placenta, produce a gonadotropin that directs continued production of estrogens and progesterone throughout the pregnancy.

Answer to q. 2

b
tere Author
wrote...
#2
7 years ago
This is very helpful, my teacher this year is not good
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