Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..
Following nine months inside the mother's womb is the birth of the baby. Know the different stages of the birthing proce..
This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..
Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
