Which of the following phyla is not correctly matched
to its general characters?
1. |
Porifera |
- |
Primitive multicellular animals which have intracellular digestion, internal fertilization and indirect development |
2. |
Ctenophora |
- |
Exclusively marine, radially symmetrical, diploblastic have comb plates and colloblast cells |
3. |
Echinodermata |
- |
Pentamerous radial symmetry and mostly internal fertilization |
4. |
Mollusca |
- |
Basically oviparous and development is indirect through a trochophore or veliger larva |
From the given statements which of the following
statement(s) is/are incorrect for Annelida?
a. Pseudometameric segmentation present
b. Coelomic fluid acts as a hydrostatic skeleton
c. They possess longitudinal and circular muscles
which help in locomotion
d. Neural system consists of paired ganglia connected
by lateral nerves to a single ventral nerve chord
1. a & b only
2. b & c only
3. a only
4. a & d only
Annelids do not represent:-
1. Circumpharyngeal nerve ring
2. Longitudinal muscles in the gut
3. Metameric segmentation
4. Mesodermal pouches in body cavity
What is true about Nereis, scorpion, cockroach and silver fish ?
1. They all possess dorsal heart
2. None of them is aquatic
3. They all belong to the same phylum
4. They all have jointed paired appendages
Which of the following statement is incorrect with respect to vertebrates?
1. Vertebrates possess notochord during the embryonic period
2. Notochord is replaced by a cartilaginous or bony vertebral column in the adult
3. All vertebrates are chordates but all chordates are not vertebrates
4. Vertebrates have a dorsal muscular heart with two, three, or four chambers
The most distinctive feature of echinoderms is the presence of a water vascular system which helps in
(A) Locomotion
(B) Excretion
(C) Respiration
(D) Reproduction
1. (A) only
2. (B) & (C) only
3. (A), (B) & (C) only
4. (A), (B), (C) & (D)
Which of the following chordata is characterised with marine habitat, external fertilization and direct development?
1. Petromyzon.
2. Antedon.
3. Hippocampus.
4. Scolodion.
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.
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
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.