Illustrate the factors that allow the aquatic pyramid of biomass to be inverted.

Phytoplankton are the aquatic producers that form the bottom of aquatic food webs, but their total biomass at any given time is actually very small. They are able to support the higher trophic levels because they grow and reproduce much more quickly than the other organisms in the food web.

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.