Practice MCQs for NEET Biology Animal Kingdom
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Multiple Choice Questions
(a) Cockroach, locust, molluscs
(b) Non-cephalopod molluscs, cockroach
(c) Cephalopod molluscs and earthworm
(d) Hemichordates and non-cephalopod molluscs
Show Answer & Explanation
Answer: (c) Cephalopod molluscs and earthworm
Explanation:
1. Cephalopod molluscs and annelids like earthworm have a closed circulatory system, whereas arthropods and other molluscs have an open one.
Teacher's Note:
1. Closed means blood stays in vessels.
(a) Sponges
(b) Coelenterates (Cnidarians)
(c) Aschelminthes (Round worms)
(d) Ctenophores
Show Answer & Explanation
Answer: (c) Aschelminthes (Round worms)
Explanation:
1. Round worms (Aschelminthes) are bilaterally symmetrical and triploblastic. Sponges and cnidarians are not, and ctenophores are biradial.
Teacher's Note:
1. Aschelminthes are pseudocoelomate.
(a) Pseudocoelom
(b) Schizocoel
(c) Haemocoel
(d) Enterocoelom
Show Answer & Explanation
Answer: (a) Pseudocoelom
Explanation:
1. A body cavity derived from the blastocoel and not lined by mesoderm is a pseudocoelom.
Teacher's Note:
1. True coelom is mesoderm lined.
(a) Acoelomates
(b) True coelomates
(c) Vertebrates
(d) Echinoderms only
Show Answer & Explanation
Answer: (b) True coelomates
Explanation:
1. Schizocoelomates and enterocoelomates both possess a true coelom lined with mesoderm.
Teacher's Note:
1. Eucoelomate means true coelomate.
(a) Absence of notochord
(b) Heart is ventral
(c) Gill slits are absent
(d) Chitinous exoskeleton present
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Answer: (b) Heart is ventral
Explanation:
1. Chordates have a ventral heart; non-chordates have a dorsal heart, so a ventral heart cannot be a non-chordate character.
Teacher's Note:
1. Think of dorsal heart in cockroach.
(a) Millipede: terrestrial, with two pairs of jointed appendages on most body segments, respires through trachea
(b) Nereis: numerous setae on lateral appendages called parapodia
(c) Taenia solium: body covered with cuticle, alimentary canal absent
(d) Ctenophores: radially symmetrical, devoid of cnidoblasts, polyp stage present in life cycle
Show Answer & Explanation
Answer: (d) Ctenophores: radially symmetrical, devoid of cnidoblasts, polyp stage present in life cycle
Explanation:
1. Ctenophores are biradially symmetrical and devoid of cnidoblasts but have no polyp stage, so (d) is an incorrect match.
Teacher's Note:
1. Polyp stage is cnidarian.
a. Planula (i) Mussell
b. Glochidium (ii) Crab
c. Nauplius (iii) Obelia
d. Cysticercus (iv) Nereis (v) Taenia solium
(a) a(iv), b(i), c(ii), d(v)
(b) a(ii), b(i), c(v), d(iii)
(c) a(iii), b(i), c(ii), d(v)
(d) a(i), b(iii), c(ii), d(v)
Show Answer & Explanation
Answer: (c) a(iii), b(i), c(ii), d(v)
Explanation:
1. Obelia forms the planula larva, a mussel the glochidium, a crab the nauplius and Taenia solium the cysticercus.
Teacher's Note:
1. Learn larva-animal pairs.
(a) Food gathering
(b) Respiratory gas exchange
(c) Removal of waste
(d) Locomotion
Show Answer & Explanation
Answer: (d) Locomotion
Explanation:
1. The canal system of sponges is for food gathering, gas exchange and waste removal; sponges are sessile, so it is not concerned with locomotion.
Teacher's Note:
1. Water current flows through pores.
Statement-1 : Choanocytes are characteristic cells of porifera.
Statement-2 : In sycon type canal system, both radial and incurrent canals are lined by choanocytes.
(a) Both statements 1 and 2 are correct
(b) Statement 1 is correct and statement 2 is incorrect
(c) Statement 1 is incorrect and statement 2 is correct
(d) Both statements 1 and 2 are incorrect
Show Answer & Explanation
Answer: (b) Statement 1 is correct and statement 2 is incorrect
Explanation:
1. Choanocytes are characteristic of sponges (statement 1 is correct). In the sycon canal system only the radial canals are lined by choanocytes, not the incurrent canals (statement 2 is incorrect).
Teacher's Note:
1. Sycon has radial canals with choanocytes.
(a) They all have calcareous spicules
(b) They have high regenerative power
(c) They are found only in marine water
(d) They are all radially symmetric
Show Answer & Explanation
Answer: (b) They have high regenerative power
Explanation:
1. Sponges differ in spicule type, habitat (freshwater Spongilla) and symmetry, but all show a high power of regeneration.
Teacher's Note:
1. Fragmentation and regeneration.
(a) Mouth only
(b) Body wall only
(c) Mouth and body wall respectively
(d) Mouth and tentacles respectively
Show Answer & Explanation
Answer: (c) Mouth and body wall respectively
Explanation:
1. Hydra removes undigested food through the mouth (incomplete gut) and ammonia through the body wall.
Teacher's Note:
1. Ammonotelic cnidarian.
A. Ciliated free swimming planula larva
B. Metagenesis
C. Acraspedote medusa
D. Statocysts present in medusoid stage
(a) A and B
(b) B only
(c) A, B & D
(d) A, B, C & D
Show Answer & Explanation
Answer: (c) A, B & D
Explanation:
1. Obelia has a planula larva, metagenesis and statocysts in the medusa; its medusa is craspedote, so C is wrong.
Teacher's Note:
1. Obelia is a colonial hydrozoan.
(a) Atoll reef
(b) Fringing reefs
(c) Barrier reefs
(d) Hawaiian island
Show Answer & Explanation
Answer: (a) Atoll reef
Explanation:
1. An atoll is a ring-shaped coral reef encircling a lagoon but not an island.
Teacher's Note:
1. Fringing reefs hug the shore.
(a) Hydra and Aurelia
(b) Aurelia and Adamsia
(c) Ctenoplana and Pleurobrachia
(d) Aurelia and Paramoecium
Show Answer & Explanation
Answer: (c) Ctenoplana and Pleurobrachia
Explanation:
1. Ctenophores (Ctenoplana, Pleurobrachia) are biradially symmetrical and have no cnidoblasts but colloblasts.
Teacher's Note:
1. Comb jellies.
(a) Cnidarians
(b) Platyhelminthes
(c) Ctenophora
(d) Nematodes
Show Answer & Explanation
Answer: (c) Ctenophora
Explanation:
1. Statocysts at the aboral end are a feature of phylum Ctenophora.
Teacher's Note:
1. Used for balance.
(a) Man
(b) Goat
(c) Sheep
(d) Pig
Show Answer & Explanation
Answer: (d) Pig
Explanation:
1. The cysticercus (bladder worm) larva of Taenia solium develops in the muscles of the pig, its secondary host.
Teacher's Note:
1. Man is the primary host.
(a) Redia
(b) Miracidium
(c) Metacercaria
(d) Cercaria
Show Answer & Explanation
Answer: (b) Miracidium
Explanation:
1. The free-swimming ciliated larva of the liver fluke is the miracidium.
Teacher's Note:
1. Redia and cercaria follow in snail.
(a) Fasciola
(b) Ancylostoma
(c) Asterias
(d) Ascidia
Show Answer & Explanation
Answer: (a) Fasciola
Explanation:
1. Fasciola, a flatworm, has an incomplete gut with a single opening for mouth and anus.
Teacher's Note:
1. Ancylostoma has complete gut.
(a) Absence of body cavity
(b) Bilateral symmetry
(c) Radial symmetry
(d) Presence of pseudocoel
Show Answer & Explanation
Answer: (a) Absence of body cavity
Explanation:
1. Platyhelminthes are acoelomate, whereas annelids are coelomate; both are bilaterally symmetrical.
Teacher's Note:
1. No body cavity in flatworms.
Practice MCQs for NEET Biology Animal Kingdom
About Animal Kingdom MCQs for NEET Biology
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FAQs
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