Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..
DNA is a double helix structure comprised of nucleotides. A nucleotide, in turn, is made up of phosphate molecule, deoxy..
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..
Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..
Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..