CBSE Tutorials

Diversity in the Living World | Part 2 Animal Kingdom (Animalia ) These are organisms which are eukaryotic, multicellular and heterotrophic. Their cells do not have cell-walls. Most animals are mobile. They are further classified based on the extend and type of the body design differentiation found. Sub-Kingdom (Porifera) The word means organisms with holes.…

Diversity in the Living World | Part 1 One of the cornerstones of science that is virtually unchallenged is that there is order in nature. The order found in living beings is a natural consequence of the shared evolutionary process that influences life. There are about 10 million species of organisms on earth, but only…