Which of the following characteristic features always holds true for the corresponding group of animals?

1.	Viviparous	Mammalia
2.	Possess a mouth with an upper and a lower jaw	Chordata
3.	3-chambered heart with one incompletely divided ventricle	Reptilia
4.	Cartilaginous – endoskeleton	Chondrichthyes

Which one of the following characteristics is not shared by birds and mammals?

(1) Breathing using lungs

(2) Viviparity

(3) Warm blooded nature

(4) Ossified endoskeleton

Which of the following features is not present in the phylum – Arthropoda?

(1) Metameric segmentation

(2) Parapodia

(3) Jointed appendages

(4) Chitinous exoskeleton

Select the taxon mentioned that represents both marine and freshwater species

(1) Echinoderms

(2) Ctenophora

(3) Cephalochordata

(4) Cnidaria

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

(1) Cyanobacteria

(2) Sea-fan (Gorgonia)

(3) Saccharomyces

(4) Blue-green algae

Planaria posses high capacity of

(1) metamorphosis

(2) regeneration

(3) alternation of generation

(4) bioluminescence

A marine cartilaginous fish that can produce electric current is

(1) Pristis

(2) Torpedo

(3) Trygon

(4) Scoliodon

Infection of Ascaris usually occurs by

(1) drinking water containing egg of Ascaris

(2) eating imperfectly cooked pork

(3) tse-tse fly

(4) mosquito bite

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

What will you look to identify the sex of the following?