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Q. No.In Ctenophora:
a:
body bears eight external rows of ciliated comb plates, which help in locomotion.
b:
reproduction takes place only by asexual means.
c:
digestion is both extracellular and intracellular.
d:
sexes are separate.
The correct statements are:
1.
a and c only
2.
b and d only
3.
a, b and c only
4.
a, b and d only
Subtopic: Phylum Ctenophora |
70%
Level 2: 60%+
Hints
The structure shown in the given figure helps flatworms in:
| 1. | Catching food and digesting it |
| 2. | Exchange of gases |
| 3. | Excretion and Osmoregulation |
| 4. | Regeneration of lost body parts |
Subtopic: Phylum Platyhelminthes |
87%
Level 1: 80%+
Hints
Members of the Phylum Platyhelminthes differ from animals belonging to Phylum Annelida and Phylum Arthropoda in:
1. having two germ layers instead of three
2. lacking a coelom
3. showing bioluminescence
4. having a complete digestive system
1. having two germ layers instead of three
2. lacking a coelom
3. showing bioluminescence
4. having a complete digestive system
Subtopic: Phylum Platyhelminthes |
74%
Level 2: 60%+
Hints
Metamerism evolved for the first time in the members of the Phylum:
| 1. | Annelida | 2. | Platyhelminthes |
| 3. | Aschelminthes | 4. | Chordata |
Subtopic: Phylum Annelida |
84%
Level 1: 80%+
Hints
Unlike Arthropods, Annelids:
| 1. | have a true coelom lined by embryonic mesoderm |
| 2. | have a closed circulatory system |
| 3. | do not reproduce by sexual methods |
| 4. | have a complete digestive system |
Subtopic: Phylum Annelida |
74%
Level 2: 60%+
Hints
Which of the following is not an Echinoderm?
| 1. | Sea Urchin | 2. | Sea lily |
| 3. | Brittle star | 4. | Brain coral |
Subtopic: Phylum Echinodermata |
81%
Level 1: 80%+
Hints
Consider the given two statements:
| Statement 1: | Hemichordates were earlier considered as a sub-phylum under Phylum Chordata but are now placed separately in a phylum under non-Chordata. |
| Statement 2: | Hemichordates have a rudimentary structure in the collar region called stomochord, a structure homologous to the notochord. |
| 1. | Both Statement 1 and Statement 2 are correct but Statement 2 does not explain Statement 1. |
| 2. | Statement 1 is correct and Statement 2 is incorrect. |
| 3. | Both Statement 1 and Statement 2 are incorrect. |
| 4. | Both Statement 1 and Statement 2 are correct and Statement 2 explains Statement 1. |
Subtopic: Phylum Hemichordata |
Level 4: Below 35%
Hints
Which of the following represents the correct combination without any exception?
| Characteristic | Class | |
| 1. | Mammary gland; hair on body; pinnae; two pairs of limbs | Mammalia |
| 2. | Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord | Chondrichthyes |
| 3. | Sucking and circular mouth; jaws absent; integument without scales; paired appendages | Cyclostomata |
| 4. | Body covered with feathers; skin moist and glandular; lungs with air sacs; fore limbs from wings | Aves |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
Level 3: 35%-60%
Hints
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?
| Genus Name | Two Characters | Phylum | ||
| 1. | Pila | (i) (ii) |
Body segmented Mouth with Radula |
Mollusca |
| 2. | Asterias | (i) (ii) |
Spiny skinned Water Vascular System |
Echinodermata |
| 3. | Sycon | (i) (ii) |
Pore bearing Canal system |
Porifera |
| 4. | Periplaneta | (i) (ii) |
Jointed appendages Chitinous exoskeleton |
Arthropoda |
Subtopic: Phylum Mollusca |
83%
Level 1: 80%+
Hints
The collared flagellated cell shown in the given figure is called as a:
| 1. | Choanocyte and helps sponges in movement of water through their canal system |
| 2. | Choanocyte and helps sponges in reproducing asexually under favourable conditions |
| 3. | Cnidocyte and helps sponges in catching their prey by paralyzing them |
| 4. | Colloblast and helps sponges in sticking to a surface |
Subtopic: Phylum Porifera |
66%
Level 2: 60%+
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