Phylum Echinodermata

Q.

What are the characteristics of hemichordates?

Q. The proboscis gland is an excretory organ in

1. Dentalium
2. Echinus
3. Cucumaria
4. Saccoglossus

Q.

Water vascular system is found in

1. Sea-pen

2. Sea-anemone

3. Sea-cucumber

4. Sea-horse

Q.

Are Porifera & Cnidaria acoelomates?

Q. Mouth in starfish is on the _________ surface and anus is on the _________ surface respectively.

1. oral, ventral
2. aboral, dorsal
3. aboral, oral
4. oral, aboral

Q. Why do echinoderms posses radial symmetry in embroynic stage but transform to bilateral symmetry in adult?

Q.

The excretory organ in molluscs is the

1. malphigian tubule

2. organ of Bojanus

3. flame cells

4. protonephridia

Q. Blastopore develops into the anus in

1. protostomes
2. deuterostomes
3. pseudocoelomates
4. acoelomates

Q.

How do flatworms reproduce sexually?

Q.

Identify the phylum in which adults exhibit radial symmetry and lara exhibit bilateral symmetry.

Q.

Phylum that exhibit radial symmetry are:

1. Coelenterates
2. Echinoderms
3. All of these
4. Ctenophores

Q. Animals of the phyla _______ and _______ are exclusively marine.

1. Cnidaria, Ctenophora
2. Ctenophora, Echinodermata
3. Mollusca, Echinodermata
4. Arthropoda, Cephalochordata

Q. Echinoderms have endoskeletons made of ossicles.

1. calcareous
2. chlorinated
3. sulphurous
4. ferrous

Q. Calcareous ossicles form the

1. exoskeleton of echinoderms
2. endoskeleton of echinoderms
3. exoskeleton of sponges
4. endoskeleton of cnidarians

Q.

The surface of an echinoderm body, where the mouth is formed is termed as ____.

1. Oral surface

2. Aboral surface

3. Lateral surface

4. Vascular surface

Q.

Read the assertion and reason carefully to mark the correct option in question.

Assertion: Ammonia is generally excreted by diffusion across body surfaces or through gill surfaces $\left(\text{in fish}\right)$ as ammonium ions.

Reason: Ammonia is readily soluble in water.

Q.

Which among the following phyla has adults exhibiting radial symmetry while the larvae exhibits bilateral symmetry?

1. Annelida
2. Arthropoda
3. Echinodermata
4. Mollusca

Q.

Collar cells occur in which of the followiing?

1. Sponges

2. Hydra

3. Sandworm

4. Star fish

Q. The animals with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage, belong to the phylum :

1. Mollusca
2. Cnidaria
3. Annelida
4. Echinodermata

Q. Spiny skinned animals are placed in the phylum ________.

1. Hemichordata
2. Mollusca
3. Coelenterata
4. Echinodermata

Q.

Define spongocoel.

Q. Members of which phylum are deuterostomes?

1. Echinodermata
2. Mollusca
3. Arthropoda
4. Annelida

Q. Spiny bodied animals
(a) Are exclusively marine
(b) Have ventral anus
(c) Have radially symmetrical larva
(d) Lack excretory system
Which of the statements are correct?

1. All correct
2. a & b
3. a, c, d
4. only a

Q. On the basis of which of the following features the sponges can be differentiated from the coelenterates?

1. Acoelomates
2. Asexual reproduction by budding
3. Diploblastic body wall
4. Canal system

Q. Choose the correct statement about body symmetry exhibited by echinoderms.

1. Radially symmetrical adults and bilaterally symmetrical larvae
2. Bilaterally symmetrical adults and asymmetrical larvae
3. Metamerically segmented adults and asymmetrical larvae
4. Bilaterally symmetrical adults and radially symmetrical larvae

Q.

Ureotelic animals are those which eliminate the nitrogenous wastes predominantly in the form of

1. uric acid

2. ammonia

3. amino acid

4. urea

Q. Symmetry of adult echinoderm is

1. Bilateral
2. Radial
3. Asymmetrical
4. Biradial

Q. Choose the odd one out.

1. Devil fish
2. Cuttlefish
3. Sea hare
4. Starfish

Q.

Which of the following functions are not performed by the water vascular system in Asterias?

1. Locomotion

2. Respiration

3. Food capture

4. Reproduction

Q. Excretory organs are absent in

1. molluscs
2. annelids
3. echinoderms
4. hemichordates