What parts in a house are like a nucleus like uhh example: the gates and doors are like the cell membrane bc the gates and doors control what comes in and out

a chair, a bed, and a toothbrush

explanation:

bc blah

explanation:

bc blah

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.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex