The reproductive cycle in females coordinated by the pituitary gland and its hormone secretion which affects the availability of gametes readily available to be fertilised and maintains the presence of secondary sexual characteristics...
This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..
Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..
