Notochord

Q.

Earthworm has how many segments?

1. 100-200

2. 85-400

3. 20-95

4. 45-120

Q. Notochord originates from

1. ectoderm
2. mesoderm
3. endoderm
4. none of the above

Q.

When can a notochord be seen in humans?

Q.

Metameric segmentation is the characteristic of

1. Platyhelminthes and Arthropoda

2. Annelida and Arthropoda

3. Mollusca and Chordata

4. Echinodennata and Annelida

Q. Body having meshwork of cells internal cavities lined with food filtering flagellated cells are indirect development are characteristics of phylum

1. Coelenterata
2. Porifera
3. Mollusca
4. Protozoa

Q.

An example of Pseudocoelom.

Q.

Which of the following exhibits true metamerism?

1. Platyhelminthes

2. Annelida

3. Arthropoda

4. Both 1 & 2

Q.

Haemocoel is found in

1. Annelida

2. Coelenterata

3. Arthropoda

4. Porifera

Q.

It is believed that true chordates have evolved from the phylum ___

1. Echinodermata

2. Hemichordata

3. Urochordata

4. Cephalochordata

Q. What is the phylum of octopus?

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

Q. External segmentation is absent but internal segmentation is present in

1. Oligochaeta
2. Archiannelida
3. Polychaeta
4. Hirudinea

Q.

Which of the following is not a character of ?

1. Metamerism

2. Apolysis

3. Strobila

4. Proglottid

Q. Read the statements regarding echinoderms and choose the correct option
(i) All are marine with organ system level of organization
(ii) Adults are bilaterally symmetrical
(iii) They are dioecious
(iv) Fertilization is internal and indirect development is observed
(v) Triploblastic and acoelomate animals

1. (i) and (iii) are correct
2. (v) alone is correct
3. (i), (iii) and (v). are correct
4. (i) and (ii) are correct
5. (i) and (v) are correct

Q. Pentamerous radial symmetry is the characteristics of phylum

1. Coelenterata
2. Porifera
3. Annelida
4. Echinodermata

Q. In phylum echinodermata, the classes having pedicellariae are

1. Crinoidea and holothuroidea
2. Asteroidea and echinoidea
3. Holothuroidea and echinoidea
4. Ophiuroidea and holothuroidea

Q. A phylum exclusively marine is

1. Coelenterate
2. Porifera
3. Protozoa
4. Echinodermata

Q.

Which of the following is a primary chordate character?

1. Dorsal tubular nerve cord

2. Ganglionated nerve cord

3. Paired nerve cord

4. Solid ventral nerve cord

Q. The molluscan without a shell is

1. Sepia
2. Octopus
3. Nautilus
4. Loligo

Q. The following figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.

1. (a) and (d) have cindoblasts for self-defence.
2. (c) and (d) have true coelom.
3. (a) and (b)respire mainly through body wall.
4. (b) and (c) show radial symmetry

Q. Which one of the following animal phyla possesses spicule?

1. Annelida
2. Mollusca
3. Porifera
4. Platyhelminthes

Q. Phylum Mollusca is differentiated from others by:

1. Bilateral symmetry and external skeleton
2. Shell and non-segmented body
3. Mantle and non-segmented body
4. Mantle and gill

Q. Identify the animal group having :
Spiny body and radial symmetry