7. Which of the following about mutations is not true
a. A mutation is a change in a DNA sequence
b. All mutations are harmfull
C. All mutations occur randomly
d. Mutations can lead to evolution

B.)

Explanation:

Not all mutations are harmful because come animals mutate to help them adapt to their environment.

the correct answer is ( hypoglycemia ); good luck

explanation:

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.