Answer:
I think it's (E) but I'm not sure
.....estrogen and progesterone are low
In women, menstrual flow occurs
as a result of the actions of some hormone between the pituitary gland in the
brain and the ovaries. Female sex hormones prepare the body for fertilization
every month and without fertilization there is menstrual flow. Menstruation is activated
by reduced levels of the hormones estrogen and progesterone at the end of the
previous menstrual flow.
Answer:no
Explanation:
Everyone got a unique heartbeat,it's based on the size and the shape of your heart and The orientation of your valves your physiology.
Your heart can beat faster but electrically your beats look the same .
So whether it beats faster or slower,it doesn't really matter.
Answer:
B.) Move things out of the cell
Explanation:
Answer:
D
Explanation:
The only way for giraffes to evolve over time towards having long necks would be to have genetic differences that were gradually favored over time. As in, the giraffes that were genetically disposed to have necks just a bit longer eventually survived longer, because they could eat high leaves, while those with short necks died, and the long-necked giraffes reproduced more, which increased the allele frequencies of long necks in the species over time.
Never, never say A or B!! This is known as Lamarck's theory of inheritance of acquired characteristics, and it's simply wrong.
C is wrong, because the mutation must occur in the original zygote.
