In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
It only takes one biological cell to create an organism. A single cell is able to keep itself functional through its 'mi..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..
Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..
The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..
