Ascaris is characterized by:

(1) Presence of true coelom but absence of metamerism

(2) Presence of true coelom and of metamerism

(3) Absence of true coelom but presence of metamerism

(4) Presence of neither true coelom nor metamerism

 

Identify the chordates in which the notochord persists in the adult?

Which of the following is not a feature of Ctenophora?

In Amphibia:
I. Skin is moist without scales
II. A tympanum represents the ear
III. Fertilization is external
1. Only I and II are correct       

2. Only I and III are correct
3. Only II and III are correct            

4. I, II, III are correct

In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk?

Pinworm, Hookworm and Filaria worm belong to:

Identify the incorrect statement regarding Class Cyclostomata?

Cartilaginous fishes differ from bony fishes by :

1. presence of gill slits   

2. absence of operculum

3. presence of pectoral fins

4. presence of scales

In contrast to Annelids the Platyhelminths show

1. Absence of body cavity

2. Presence of pseudocoel

3. Radial symmetry

4. Bilateral symmetry

The number of correct statements, regarding cockroach, amongst the given statements is:

I. Dorsal sclerites are called as sternites and the ventral sclerites are called tergites.

II. While labrum is the upper lip and labium is the lower lip, the hypopharynx acts as tongue.

III. Anal cerci are seen in both sexes but anal styles are found in male cockroaches only.

IV. Each thoracic segment bears a pair of walking legs.

V. Forewings called tegmina are use in flight while the hind wings are opaque, dark and leathery.

 1.  2       

 2.  3

 3.  4     

 4.  5