Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristic of phylum

• Coelenterate

• Porifera

• Mollusca

• Mollusca

Select the taxon mentioned that represents both marine and freshwater species

• Echinoderms

• Ctenophora

• Cephalochordata

• Cephalochordata

Which one of the following living organisms completely lacks a cell wall?

• Cyanobacteria

• Sea-fan (Gorgonia)

• Saccharomyces

• Saccharomyces

Planaria possess high capacity of 

• metamorphosis

• regeneration

• alternation of generation

• alternation of generation

A marine cartilaginous fish that can produce electric current is 

• Pristis

• Torpedo

• Trygon 

• Trygon 

16.

In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?

• Genus Name		Two characters	Phylum
  pila	(i) (ii)	Body segmented Mouth with Radula	Mollusca

• Genus Name		Two characters	Phylum
  Asterias	(i) (ii)	Spiny skinned Water vascular system	Echinodermatac

• Genus Name		Two characters	Phylum
  Sycon	(i) (ii)	Pore bearing Canal system	Porifera

• Genus Name		Two characters	Phylum
  Sycon	(i) (ii)	Pore bearing Canal system	Porifera

Which one of the following pairs is wrongly matched?

• Ginkgo – Archegonia

• Salvinia – Prothallus

• Viroids – RNA

• Viroids – RNA

Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?

• Pteropus and Ornithorhyncus - Viviparity

• Garden lizard and Crocodile - Three chambered heart

• Ascaris and Ancylostoma - Metameric segmentation

• Ascaris and Ancylostoma - Metameric segmentation

Which one of the following categories of animals, is correctly described with no single exception in it?

• All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal)

• All bony fishes have four pairs of gills and an operculum on each side

• All sponges are marine and have collared cells

• All sponges are marine and have collared cells

Which of the following characteristics is mainly responsible for diversification of insects on land?

• Segmentation

• Bilateral symmetry

• Exoskeleton

• Exoskeleton