Which of the following best describes energy transformations in ecosystems? a. most energy in a lower trophic level is passed to higher trophic levels. b. heat is not a significant waste product as energy passes between trophic levels. c. most of the energy collected by an organism is not passed on to other organisms. d. tertiary consumers collect the most energy in an ecosystem.

C. best describes energy formations in ecosystems.

The correct answer for above statement is:

A series of organisms, each of which works as a beginning of food or energy for the next. It defines how chemical energy and nutrients move from one person to different within the trophic levels in an ecosystem by the related pathways essentially by photosynthesis, feeding, and decomposition

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.