In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
This tutorial describes the different types and causes of brain damage. Find out how genetics, physical injury, lack of ..
Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..