Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..
A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..