Solved MCQS of Zoology Set 1

All are the characteristics of phylum cnidaria except

Presence of mesoglea

gastrovascular cavity

contain nematocysts

Contain mesenchyme

All the following characteristics are present in Dephnia except

One pair of compoynd eyes

Presence of parapodia

Eight pairs of thoracic appendages

Carapace covers thorax

In Schizogony ———– divisions takes place in mature individual

Multiple mitotic

Meiotic

Mitotic

First mitotic then meiotic

Except —————- all are the members of class Lobosea

Difflugia

Ameoba proteus

Arcella

polystomella

Water exits the mantle cavity of a bivalve through the ———— and the excurrent opening

suprabranchial chamber

pericardial cavity

water tube

incurrent opening

Which of the following is a distinct feature that occurs in all pseudocoelomate phyla?

cuticle

pseudocoelom

none of the above

adhesive glands

Which of the following is true of the visceral mass of a mollusc?

It is used in locomotion

It contains gonads and digestive glands

It contains the gills

It secretes the shell

The absence of a shell in the aplacophora is a primitive character in the phylum Mollusca

TRUE

FALSE

None of Above

The main propulsive structure(s) in the circulatory system of an earthworm is (are)

Dorsal and ventral blood vessels

Seminal vesicles

Hearts

The typhlosole.

Members of the gastropod subclass Pulmonata are predominantly freshwater or terrestrial. Their mantle is modified into a lung, which opens to the outside of the mantle cavity through a/an

Operculum

Siphon.

Pneumostome.

Umbo.