What is the function of guard cells?

Explanation:

regulates the entry of materials needed for the process of photosynthesis. can contain chloroplast which can also make them a site of photosynthesis

answer; atp and nadph;

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.