Natural selection acts on the variation in populations of living things, usually through a specific trait. Which statement must be frue about that trait?

1. The trait is the same for all organisms.

2. The trait is passed on genetically to the next generation.

3. All forms of the trait have the same impact on survival.

4. The trait is resistant to mutations.

they absorb it i think

not sure

you

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.

i need