Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..
Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..
There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..