In class Asteroidea, what serves to keep the body surface clear of encrusting organisms?

1. Tube feet

2. Madreporite

3. Spines

4. Pedicellariae

Which of the following is not a characteristic of protostome type of development?

In echinoderms and chordates (dueterostomes), the coelom develops from

1. Invagination of the blastopore

2. Evagination of the archenteron

3. Invagination of the archenteron

4. Evagination of the blastopore

The echinoderms are called as "spiny skinned" because they have

1. Protruding tube feet

2. Chitinous exoskeleton

3. A bony endoskeleton

4. Calcium-rich endoskeleton

The largest class of Echinodermata includes

1. Brittle stars

2. Sand dollars

3. Sea urchins

4. Sea stars

The most common mode of reproduction in echinoderms is

1. Sexual and external

2. Hermaphroditic

3. Sexual and internal

4. Asexual by fragmentation

The embryonic development of the echinoderm makes them closest to

1. Annelids

2. Mollusks

3. Porifers

4. Chordates

Which of the following is not a charcteristic of all chordates?

(1) Dorsal nerve cord

(2) A muscular diaphragm

(3) Coelom

(4) Pharyngeal gill slits

A common characteristic of all vertebrates is

Bull frog of India is

1. Rana tigerina

2. Rana sylvatica

3. Rana ecutedbeiana

4. Rana esculenta