Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female.
Pyramid of energy is a graphical representation of the amount of accumulated energy per unit area in different trophic levels of a food chain. An energy pyramid is always upright because there is a gradual decrease in energy at successive trophic levels. This happens because according to the 10% law of energy transfer, only 10% of the total energy is transferred from one trophic level to another. The energy is highest at the producer level and it gradually decreases on moving from herbivores to carnivores.
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- Menstrual Cycle (Ovarian Cycle)