All Porifers:
1. are marine animals
2. are radially symmetrical
3. reproduce only sexually
4. have cellular grade of organization

Subtopic:  Basis of Classification |
 88%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Physalia (Portuguese man-of-war), Adamsia (Sea anemone), Pennatula (Sea-pen), Gorgonia (Sea-fan) and Meandrina (Brain coral) all belong to:
1. Sponges 2. Cnidaria
3. Mollusca 4. Echinodermata
Subtopic:  Phylum Coelenterata |
 91%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Consider the given two statements:
Assertion(A): Muscle tissue is not seen in diploblastic animals.
Reason (R): An undifferentiated layer, mesoglea, is present in between the ectoderm and endoderm in diploblastic animals.
 
1. Both (A) and (R) are True and (R) correctly explains (A).
2. Both (A) and (R) are True but (R) does not correctly explain (A).
3. (A) is True; (R) is False
4. Both (A) and (R) are False
Subtopic:  Phylum Coelenterata |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Statement I: In Cnidarians, polyp is a sessile and in cylindrical form and medusa is umbrella-shaped and free-swimming.
Statement II: In Cnidarians, polyps produce medusae asexually and medusae form the polyps sexually.
 
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic:  Phylum Coelenterata |
 90%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Which of the following is not a Cnidarian?
1. Sea anemone 2. Sea-pen
3. Sea-fan 4. Sea-hare
Subtopic:  Phylum Coelenterata | Phylum Mollusca |
 80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Amphibians are not characterised by the presence of:
1. Dry skin, with placoid scales
2. Eyelids
3. A tympanum
4. Three-chambered heart
Subtopic:  Study of Amphibians |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Crocodiles:
I: have a four chambered heart.
II: are endotherms.
 
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic:  Study of Reptilia |
 69%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Ornithorhynchus is:
1. a flightless bird
2. a limbless amphibian
3. an egg laying mammal
4. an extinct reptile that was direct ancestor of mammals
Subtopic:  Study of Aves & Mammals |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

What structure in molluscs forms the shell and houses the gills?
1. mantle
2. epidermis
3. gastrovascular cavity
4. odontophore
Subtopic:  Phylum Mollusca |
 94%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Assertion(A): Cnidarians and Echinoderms are diploblastic animals.
Reason(R): Cnidarians and Echinoderms lack mesoderm.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False and (R) is False.
Subtopic:  Phylum Coelenterata | Phylum Echinodermata |
 75%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.