Hormones are essential in the regulation of the activity of the various biological systems of the human body. The ineffi..
This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..
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..
Ferns and their relatives are vascular plants, meaning they have xylem and phloem tissues. Because of the presence of va..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..
Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..