Which of the following set of animals belong the phylum hemichordate?
1. Balanoglossus, Saccoglossus
2. Salpa, Doliolum
3. Petromyzon, Myxine
4. Dentalium, Chaetopleura
Similarity between protochordata and hemichordata is
1. Presence of notochord.
2. Exclusively marine.
3. Dorsal hollow and single central nervous system.
4. Exclusively parasitic.
Vertebrates and seastars may seen as different as two
animal groups can be, yet they share
1. The same type of body symmetry as adults.
2. A high degree of cephalization.
3. Certain developmental pattern, including the type
of coelom formation.
4. The presence of endoskeleton that include
cranium
All the following are present in sponges, except
1. Spicules
2. Choanocytes
3. A digestive tract
4. Sexual and / or asexual reproduction
Find out the correct match from the following table:-
|
Column-I |
Column-II |
Column-III |
(i) |
Radula |
Rasping organ |
Pila |
(ii) |
Hooks and suckers |
Taenia |
Annelida |
(iii) |
Tube feet |
Asterias; Dentalium |
Echinodermata |
(iv) |
Comb plates |
Pleurobrachia; Aurelia |
Ctenophora |
1. (i) only
2. (i) and (ii)
3. (iii) only
4. (ii) and (iii)
Excretory system is absent, sexes are separate,
fertilization is usually external this is correct for :
1. | 2. | ||
3. | 4. |
Select the correct option in respect of characteristics
of each group :-
|
Cyclostomes |
Chondrichthyes |
Osteichthyes |
(i) |
Marine |
Marine, Fresh water |
Marine |
(ii) |
Sucking mouth |
Ventral mouth |
Terminal mouth |
(iii) |
6-15 Pairs of Gills |
5-7 Pairs of Gills |
4 Pairs of Gills |
(iv) |
Placoid scales |
Cycloid Scales |
Ctenoid/ Ganoid |
1. (i), (ii) are correct.
2. (i), (iii), (iv) are correct.
3. (ii), (iii) are correct.
4. (ii), (iii), (iv) are correct.
Read the following statements :
A. Mouth is located ventrally.
B. Notochord is persistent throughout life.
C. Gill slits are seperate and with operculum.
D. Air bladder are absent.
How many of the above statements are correct for given
figure :
1. Four.
2. Three.
3. Two.
4. One
Mark the correct match with the group and its
characteristic?
1. Arthropoda Compound eye and wings.
2. Mammalia Viviparity.
3. Echinodermata Calcareous endoskeleton.
4. Annelida Fresh water and segmented body.
Which of the following chordata is characterised with marine habitat, external fertilization and direct development?
1. Petromyzon.
2. Antedon.
3. Hippocampus.
4. Scolodion.