This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..
The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..
Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..
Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..
Plants and animals need elements, such as nitrogen, phosphorus, potassium, and magnesium for proper growth and developme..
Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..