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NEET • BIOLOGY • ANIMAL KINGDOM
Animal kingdom practice · Medium
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121
Medium
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Understanding
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Regeneration in Hydra will be faster, if it is cut off from
View answer and explanation
Correct option: A
Tentacles
Option A (Tentacles) is correct because the concentration of growth factors is lower in the tentacles, leading to faster regeneration when removed.
122
Medium
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Analyzing
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Which of the following animals have different symmetry in comparison to the other three?
View answer and explanation
Correct option: D
Asterias
Option A (Asterias) is different because juvenile Asterias exhibits bilateral symmetry, while Pila, Pleurobrachia, and Sycon exhibit radial symmetry.
123
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Remembering
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What is the scientific name of pinworm of man?
View answer and explanation
Correct option: D
Enterobius vermicularis
Option D (Enterobius vermicularis) is correct because Enterobius vermicularis is the scientific name for the pinworm that infects humans.
124
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Analyzing
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Hirudinaria differs from Nereis in all of the following features, except
a. Nephridia to remove excretory waste
b. Development is indirect
c. Dioecious with sexual dimorphism
d. Presence of parapodia
Choose the correct option.
a. Nephridia to remove excretory waste
b. Development is indirect
c. Dioecious with sexual dimorphism
d. Presence of parapodia
Choose the correct option.
View answer and explanation
Correct option: A
a only
Option A (a only) is correct because both Hirudinaria (leech) and Nereis (clamworm) have nephridia for excretion. The other options describe features that differentiate them.
125
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Analyzing
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Which of the following classes is incorrectly matched with its general characters?
View answer and explanation
Correct option: A
Cyclostomata – Lack jaws and paired fins and body is covered with placoid scales
Option A is correct because cyclostomes lack jaws and paired fins, and their body is not covered with placoid scales.
126
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Remembering
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Pleurobrachia and ctenoplana are
View answer and explanation
Correct option: B
ctenophores
Option B (ctenophores) is correct because both Pleurobrachia and Ctenoplana are members of the phylum Ctenophora, characterized by the presence of comb plates.
127
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127 of 292
Remembering
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Which of the following scientist discovered Animal nature in sponges
View answer and explanation
Correct option: A
Robert grant
Option A (Robert grant) is correct because Robert Grant was the scientist who first recognized the animal nature of sponges, challenging the earlier belief that they were plants.
128
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Remembering
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Choanocytes form the lining of paragastral cavity in
View answer and explanation
Correct option: B
Sponges
Option B (Sponges) is correct because choanocytes are flagellated collar cells that line the spongocoel (paragastral cavity) in sponges (Porifera).
129
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Analyzing
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Crocodile and penguin are similar to whale and dogfish in which one of the following features?
View answer and explanation
Correct option: D
Have gill slits at some stage.
Option D (Have gill slits at some stage) is correct because all chordates, including crocodiles, penguins, whales, and dogfish, possess gill slits at some stage of their development.
130
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Remembering
+4 | -1
Polyp phase is absent in
View answer and explanation
Correct option: B
Aurelia
Option B (Aurelia) is correct because Aurelia (jellyfish) primarily exists in the medusa form, with a reduced or absent polyp stage in its life cycle.
131
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Remembering
+4 | -1
Tube-feet are the locomotory organs of
View answer and explanation
Correct option: B
Echinodermata
Option B (Echinodermata) is correct because tube-feet are the locomotory organs of echinoderms, functioning through a water vascular system.
132
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Remembering
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Which is wrongly matched
View answer and explanation
Correct option: C
Meandrina Tube coral
Option C (Meandrina → Tube coral) is wrongly matched because Meandrina is brain coral, not tube coral. Tube coral belongs to the genus Tubipora.
133
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Remembering
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Biramous appendages are present in
View answer and explanation
Correct option: B
Crustacea
Option B (Crustacea) is correct because crustaceans are characterized by having biramous appendages, meaning each appendage branches into two parts.
134
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Understanding
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(S-I): Ctenophores exhibit bilateral summetry.
(S-II): Bioluminesence is weel marked in Ctenophores.
(S-II): Bioluminesence is weel marked in Ctenophores.
View answer and explanation
Correct option: C
S-I is false and S-II is true
Option C (S-I is false and S-II is true) is correct because Ctenophores exhibit radial symmetry, not bilateral symmetry, and bioluminescence is a well-marked characteristic of Ctenophores.
135
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Remembering
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Planaria possess high capacity of
View answer and explanation
Correct option: D
regeneration
Option D (regeneration) is correct because Planaria, belonging to the phylum Platyhelminthes, are well-known for their remarkable ability to regenerate lost body parts.
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136
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Understanding
+4 | -1
All of the following animals possess tympanum, but it represents ear only in
View answer and explanation
Correct option: D
Chameleon
Option D (Chameleon) is correct because tympanum represents the ear in reptiles like Chameleon.
137
Medium
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Understanding
+4 | -1
Study the following features of a fish
I. It is a crossopterygian fish
II. It is found in the river Chalumnae
III. It does not exhibit aestivation
IV. It is an urecotelic animal
Which of the above are true to ‘Neoceratodus’
I. It is a crossopterygian fish
II. It is found in the river Chalumnae
III. It does not exhibit aestivation
IV. It is an urecotelic animal
Which of the above are true to ‘Neoceratodus’
View answer and explanation
Correct option: C
I and III
Option C is correct because Neoceratodus (Australian lungfish) is a crossopterygian fish and does not exhibit aestivation.
138
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Understanding
+4 | -1
Correctly matched set of phylum, class and example is
View answer and explanation
Correct option: B
Mollusca-Bivalvia-Pinctada
Option C (Heart is ventral) is correct because in non-chordates, the heart, if present, is typically dorsal, not ventral. Ventral heart is a characteristic of chordates.
139
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Analyzing
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Which of the following is incorrect match?
View answer and explanation
Correct option: D
Protochordates - Exclusively in marine water, includes urochordata, cephalochordata and cyclostomata
Option D (Protochordates - Exclusively in marine water, includes urochordata, cephalochordata and cyclostomata) is the incorrect match because cyclostomata are not protochordates; they are vertebrates.
140
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Remembering
+4 | -1
The character that differentiates chordate from non-chordate is
View answer and explanation
Correct option: C
Dorsal tubular nerve cord
Option C (Dorsal tubular nerve cord) is correct because the presence of a dorsal tubular nerve cord is a defining characteristic that distinguishes chordates from non-chordates.
141
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Remembering
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Animals of class-Mammalia have
View answer and explanation
Correct option: A
Seven cervical vertebrae
Option A (Seven cervical vertebrae) is correct because mammals, with few exceptions, have seven cervical vertebrae.
142
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Remembering
+4 | -1
An animal without anus is
View answer and explanation
Correct option: C
Fasciola
Option C (Fasciola) is correct because Fasciola, a type of flatworm, lacks an anus, having an incomplete digestive system.
143
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Understanding
+4 | -1
Absence of circulatory system in Hydra is compensated by
View answer and explanation
Correct option: B
Gastrovascular cavity
Option B (Gastrovascular cavity) is correct because the gastrovascular cavity in Hydra serves as both a digestive and circulatory system, distributing nutrients throughout the body.
144
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Remembering
+4 | -1
Larva of hemichordata is
View answer and explanation
Correct option: D
Tornaria
Option D (Tornaria) is correct because the larva of hemichordates, such as Balanoglossus, is called a Tornaria larva.
145
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Remembering
+4 | -1
Amphids are cuticular elevations on ventrolateral lips of Ascaris. These are
View answer and explanation
Correct option: D
Chemoreceptors
Option D (Chemoreceptors) is correct because amphids are sensory organs in nematodes that function as chemoreceptors, detecting chemical stimuli.
146
Medium
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Understanding
+4 | -1
Select the phylum that is neither bilaterally symmetrical nor radially symmetrical nor radially symmetrical
View answer and explanation
Correct option: C
Porifera
Option C (Porifera) is correct because Porifera typically lack any form of symmetry and are thus neither bilaterally nor radially symmetrical.
147
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Remembering
+4 | -1
An important characteristic that Hemichordates share with Chordates is
View answer and explanation
Correct option: D
Pharynx with gill slits
Option D (Pharynx with gill slits) is correct because both Hemichordates and Chordates share the characteristic of having a pharynx with gill slits, used for filter-feeding or respiration.
148
Medium
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Analyzing
+4 | -1
Find the mismatch
View answer and explanation
Correct option: D
king crab – book lungs
Option D (king crab – book lungs) is correct because king crabs respire through gills, not book lungs. Book lungs are found in arachnids.
149
Medium
149 of 292
Remembering
+4 | -1
Which of the following is not found in Hydra?
View answer and explanation
Correct option: C
Choanocyte
Option C (Choanocyte) is correct because choanocytes are characteristic cells of sponges (Porifera), not Hydra (Cnidaria).
150
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Remembering
+4 | -1
Notochord is mesodermally derived rod like structure formed on the dorsal side during embryonic development in
View answer and explanation
Correct option: B
Some animals
Option B (Some animals) is correct because the notochord is a characteristic feature of chordates, but not all animals.
Revision notes and key takeaways
Review ANIMAL KINGDOM in your textbook or class notes, then use this set to check your understanding.
Showing 121-150 of 292 questions