Diversity in Living Organisms

This group of animal has multicellular with tissue grade.

This phylum is multicellular, aquatic organisms and has a cellular grade of construction without the occurance of tissues.

In this phylum, organisms exist in two different body forms namely a polyp and a medusa.

In Hydrozoa the animal has a dominant polyp body form and a reduced medusa stage.

These are the popular round worms and the body of the worm is narrow and pointed at both the ends.

Paramecium is a unicellular organism and shows streaming movement called cyclosis. It helps in intracellular circulation and distribution of materials in the cells.

Flatworms transport digested food through parenchyma. They exhibit parenchymal circulation.

Osculum is the large aperture in a (sycon) sponge through which water is expelled.

In sponges like Scypha, there is an elaborate system of canals through which water flows in a definite course and perform the functions of circulatory system.

This is the characteristics of nematoda.

These are fresh water animals and smallest among metazoa. The presence of ciliary corona, the beating of which resembles a rotating wheel, which gives the name wheel animalcules.

Mammals, along with birds, possess a four-chambered heart, which allows for the complete separation of oxygenated and deoxygenated blood.

The platypus is a monotreme, a unique group of mammals that lay eggs instead of giving birth to live young, unlike the vast majority of mammals.

Mammals and Aves are warm blooded.

Lichens are a symbiotic association between a fungus (mycobiont) and an alga or cyanobacterium (photobiont).