Diversity in Living Organisms Test - 2

The body of flatworms and roundworms is made up of three germ layers. There are three layers of cells from which differentiated tissues can be made, which is why such animals are called triploblastic.

The cell wall of fungi is made up of a complex polysaccharide (called chitin) that is present in the exoskeleton of most arthropods and cell wall of fungi.

Absorptive heterotrophy is the mode of nutrition in which an organism secretes enzymes externally into the environment to digest organic materials, which are then absorbed.

Example: Fungi, some protists and monerans

This is the correct option as this statement is false. In the scientific name Mangifera indica, 'Mangifera' represents a particular genus while 'indica' represents a species.

Vertebrates are bilaterally symmetrical. The left and the right halves of the body have the same design.

Kingdom Monera consists of prokaryotic bacteria and blue-green algae. Kingdom Protista consists of unicellular eukaryotic organisms. Kingdom Fungi consists of eukaryotic multicellular organisms.

Most mammals (e.g. bat, rat, human, cat) produce live young ones. However, a few of them, like the platypus and the echidna, lay eggs, and some, like kangaroos, give birth to very poorly developed young ones.

The number of chambers in the heart depends on the complexity of the body organization. For example, mammals are more complex and therefore, they possess maximum number of chambers in the heart (four-chambered heart) and fishes have less complex body organization than mammals, so they possess less number of chambers in the heart than found in case of mammals.

Piscean are fishes. They are exclusively water animals. Their skin is covered with scales/plates. They obtain oxygen dissolved in water by using gills. They are cold-blooded and have two-chambered heart.

In Greek, 'echinos' means 'hedgehog' (skin is not smooth but is rough with spines) and 'derma' means 'skin'. Thus, these are organisms with spines on the skin. These are free-living marine animals. They have peculiar water-driven tube system which they use for moving around in water, capture and transport of food and respiration (exchange of gases). For example, starfish and sea urchins.