An excretory system is absent in:
1. Asterias 2. Pheretima
3. Rotifers 4. Pinctada

Subtopic:  Basis of Classification |
 77%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

What would be true [T] or false [F] regarding amphibians?
I: Skin is moist and without scales.
II: Eyes have eyelids.
III: A tympanum represents the ear.
IV: Respiration is by gills, lungs and through skin.
 
I II III IV
1. T T F F
2. F F F T
3. T F T T
4. T T T T
Subtopic:  Study of Amphibians |
 83%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Consider the two statements:
Statement I: Chondrichthyes lack the capacity to regulate their body temperature.
Statement II: Osteichthyes have the capacity to regulate their body temperature.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic:  Comparative study of Cartilagenous & Bony Fishes |
 71%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Select the correct description of the two figures A and B, given below, showing basic body forms in Cnidarians:
A
B
 
1. A is Medusa and is free-swimming; B is Polyp and is sessile
2. A is Polyp and is free-swimming; B is Medusa and is sessile
3. A is Medusa and is sessile; B is Polyp and is free-swimming
4. A is Medusa and is free-swimming; B is Polyp and is free-swimming
Subtopic:  Phylum Coelenterata |
 87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Fertilisation is external and development is indirect in:
I: Sponges
II: Echinoderms
III: Hemichordates
IV: Comb jellies
V: Flatworms
 
1. I and V only
2. II, III and IV only
3. IV only
4. I, IV and V only
Subtopic:  Basis of Classification |
 73%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Chondrichthyes and Mammals:
I: do not belong to the same class but belong to the same super-class.
II: are placed under the same division in sub-phylum vertebrata.
 
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:  Comparative study of Cartilagenous & Bony Fishes |
 53%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

Ascidia, Salpa, Doliolum and Branchiostoma are all:
A: Chordates
B: Vertebrates
C: Urochordates
D: Protochordates
1. A and B are correct 2. A and C are correct
3. A and D are correct 4. B and C are correct
Subtopic:  Phylum Chordata |
 65%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

The figure shows cross-section of the body of an animal. This animal:
I: lacks a coelom
II: is triploblastic
III: is expected to have bilateral symmetry
IV: is expected to be dorso-ventrally flattened
 
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic:  Basis of Classification |
 57%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

Cnidarians, Ctenophores and Echinoderms resemble each other in:
I: having radial symmetry in adults and larvae
II: having three germ layers
III: lacking a coelom
 
1. Only I and II are correct
2. I, II and III are incorrect
3. Only I is correct
4. I, II and III are correct

Subtopic:  Basis of Classification:I | Phylum Aschelminthes |
 53%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.

advertisementadvertisement

How do members of hemichordates resemble chordates?
I: The body is segmented metamerically.
II: The symmetry is bilateral and they have a true coelom
 
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic:  Phylum Hemichordata | Phylum Chordata |
 66%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.