Which of the following represents the correct combination without any exception? 

	Characteristic	Class
(a)	Mammary gland; hair on body; pinnae; two pairs of limbs	Mammalia
(b)	Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord	Chondrichthyes
(c)	Sucking and circular mouth; jaws absent; integument without scales; paired appendages	Cyclostomata
(d)	Body covered with feathers; skin moist and glandular; lungs with air sacs; forelimbs from wings	Aves

 

1.	(a)	2.	(b)
3.	(c)	4.	(d)

Match the name of the animal (Column-I), with one characteristic (Column-II), and the phylum/class (Column-III) to which it belongs:

Select the Taxon mentioned that represents both marine and freshwater species:

Planaria possess a high capacity of:

1. metamorphosis

2. regeneration

3. alternation of generation

4. bioluminescence

A marine cartilaginous fish that can produce electric current is:

One of the representatives of the phylum Arthropoda is:

1. Silverfish

2. Pufferfish

3. Flying fish

4. Cuttlefish

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? 

One example of animals having a single opening to the outside that serves both as mouth as well as the anus is:

1. Octopus

2. Asterias

3. Ascidia

4. Fasciola