Bio elements are the essential components of life. This topic includes basic concepts such as atom, molecule and chemical bonding that introduce the student to understand the way in which bio elements make up the life.

Characteristics of Living Things Life is the group of proper qualities of living things, they have a complex material structure and have characteristics that distinguish them from inanimate objects, among which are ...

This presentation shows the characteristics of multicellular organisms and the types of plant and animal tissues.