NEET Biology Animal Kingdom MCQs Set 32

Practice MCQs for NEET Biology Animal Kingdom

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Multiple Choice Questions

Question 1: Statements: (a) hooks and suckers are present in parasitic forms, (b) some members absorb nutrients directly through the body surface, (c) fertilisation is internal and development occurs through many larval stages. These are correct for:
(a) Platyhelminthes
(b) Aschelminthes
(c) Annelida
(d) Mollusca
Show Answer & Explanation

Answer: (a) Platyhelminthes

Explanation:
1. Parasitic flatworms like Taenia have hooks and suckers, absorb food through the body surface and have internal fertilisation with several larval stages.

Teacher's Note:
1. Aschelminthes have no hooks and suckers.
2. Hence the phylum is Platyhelminthes.

Question 2: The body of these animals is dorsoventrally flattened. They are mostly endoparasites and first triploblastic animals. They are bilaterally symmetrical and acoelomate. They belong to the phylum:
(a) Annelida
(b) Nematoda
(c) Platyhelminthes
(d) Ctenophora
Show Answer & Explanation

Answer: (c) Platyhelminthes

Explanation:
1. Flatworms are dorsoventrally flattened, acoelomate and the first triploblastic animals.

Teacher's Note:
1. Many of them are parasites.
2. Ctenophores are diploblastic.

Question 3: Select the odd set of animals:
(a) Planaria, Fasciola, Taenia
(b) Ascaris, Ancylostoma, Enterobius
(c) Neries, Pheretima, Hirudinaria
(d) Euspongia, Spongilla, Sabella
Show Answer & Explanation

Answer: (d) Euspongia, Spongilla, Sabella

Explanation:
1. The sets in 1, 2 and 3 belong to Platyhelminthes, Aschelminthes and Annelida respectively.

Teacher's Note:
1. The fourth set mixes two sponges with Sabella, which is an annelid.
2. Hence set 4 is the odd one.

Question 4: What is common to a flatworm and a roundworm?
(a) Both are included in phylum Platyhelminthes
(b) Both have flame cells as excretory organs
(c) The circulatory system is absent in both
(d) Both are sexually dimorphic animals
Show Answer & Explanation

Answer: (c) The circulatory system is absent in both

Explanation:
1. Neither flatworms nor roundworms have a circulatory system.

Teacher's Note:
1. Flame cells occur only in flatworms, and flatworms are hermaphrodite.
2. They belong to separate phyla.

Question 5: Match: Phylum a Annelida, b Aschelminthes, c Platyhelminthes with Common name i Pork tapeworm, ii Pin worm, iii Sand worm and Scientific name A Enterobius, B Neries, C Taenia.
(a) a-iii,B; b-i,C; c-ii,A
(b) a-ii,B; b-iii,A; c-i,C
(c) a-iii,B; b-ii,A; c-i,C
(d) a-ii,B; b-iii,C; c-i,A
Show Answer & Explanation

Answer: (c) a-iii,B; b-ii,A; c-i,C

Explanation:
1. Annelida: sand worm, Neries; Aschelminthes: pin worm, Enterobius; Platyhelminthes: pork tapeworm, Taenia.

Teacher's Note:
1. So the option is a-iii,B; b-ii,A; c-i,C.
2. Nereis is also called the sand worm or clam worm.

Question 6: Which of the following relationships between animal and character is correct?
(a) Neries - freshwater animal and belongs to phylum Annelida
(b) Leech - 33 segmented body having haemocoelomic system
(c) Taenia - tapeworm having a complete alimentary canal
(d) Ascaris - round worm which is acoelomate
Show Answer & Explanation

Answer: (b) Leech - 33 segmented body having haemocoelomic system

Explanation:
1. A leech has 33 segments, and its coelom is filled with botryoidal tissue to form haemocoelomic sinuses.

Teacher's Note:
1. Nereis is marine, Taenia has no gut, and Ascaris is pseudocoelomate.
2. Hirudinaria is the medicinal leech.

Question 7: The detachment of gravid proglottids from the body of Taenia is known as:
(a) Regeneration
(b) Eutely
(c) Apolysis
(d) Apogenesis
Show Answer & Explanation

Answer: (c) Apolysis

Explanation:
1. Apolysis is the shedding of mature, egg filled proglottids from the end of the tapeworm.

Teacher's Note:
1. Eutely means a constant number of cells.
2. The proglottids leave through the host's faeces.

Question 8: Which one is a representative of phylum Arthropoda?
(a) Cuttle fish
(b) Fighting fish
(c) Silver fish
(d) Cat fish
Show Answer & Explanation

Answer: (c) Silver fish

Explanation:
1. Silver fish (Lepisma) is an insect, so it is an arthropod.

Teacher's Note:
1. Cuttle fish is a mollusc, and fighting fish and cat fish are true fishes.
2. Names with "fish" can mislead.

Question 9: Match: Prawn, Butterfly, Scorpion, Locust with the features q Green gland, s Holometabolous development, r Viviparous animal, p Gregarious pest.
(a) Prawn-q, Butterfly-r, Scorpion-s, Locust-p
(b) Prawn-p, Butterfly-q, Scorpion-r, Locust-s
(c) Prawn-q, Butterfly-s, Scorpion-r, Locust-p
(d) Prawn-p, Butterfly-s, Scorpion-q, Locust-r
Show Answer & Explanation

Answer: (c) Prawn-q, Butterfly-s, Scorpion-r, Locust-p

Explanation:
1. Prawn excretes by green glands, butterflies show complete (holometabolous) metamorphosis, scorpions are viviparous and locusts are gregarious pests.

Teacher's Note:
1. So the match is Prawn-q, Butterfly-s, Scorpion-r, Locust-p.
2. Scorpions give birth to young ones.

Question 10: The adult echinoderms show __A__ but the larvae show __B__.
(a) A = radial symmetry, B = bilateral symmetry
(b) A = bilateral symmetry, B = radial symmetry
(c) A and B = both radial symmetry
(d) A = asymmetry, B = bilateral symmetry
Show Answer & Explanation

Answer: (a) A = radial symmetry, B = bilateral symmetry

Explanation:
1. Adult echinoderms are radially symmetrical, whereas their larvae are bilaterally symmetrical.

Teacher's Note:
1. This shows that they evolved from bilateral ancestors.
2. Their larvae are free swimming.

Question 11: Members of which phylum have a true coelom and an unsegmented body?
(a) Annelida
(b) Mollusca
(c) Arthropoda
(d) Chordata
Show Answer & Explanation

Answer: (b) Mollusca

Explanation:
1. Molluscs have a coelom and an unsegmented body with head, muscular foot and visceral hump.

Teacher's Note:
1. Annelids, arthropods and chordates are segmented.
2. Their body is usually covered by a calcareous shell.

Question 12: The most distinctive feature of echinoderms is the:
(a) Presence of an endoskeleton of calcareous ossicles
(b) Absence of an excretory system
(c) Presence of a water vascular system
(d) All of the above
Show Answer & Explanation

Answer: (c) Presence of a water vascular system

Explanation:
1. The water vascular system, used for locomotion, food capture and respiration, is unique to echinoderms.

Teacher's Note:
1. Other animals have no such system.
2. Tube feet are a part of it.

Question 13: Find the incorrect match for body division:
(a) Arthropoda - head, thorax and abdomen
(b) Mollusca - head, muscular foot and visceral hump
(c) Hemichordata - proboscis, collar and trunk
(d) Amphibia - head, neck and trunk
Show Answer & Explanation

Answer: (d) Amphibia - head, neck and trunk

Explanation:
1. The body of an amphibian is divided into head and trunk, and a neck is absent.

Teacher's Note:
1. The first three matches are correct.
2. Reptiles have head, neck, trunk and tail.

Question 14: Statements: (a) a small group of worm like marine animals, (b) bilaterally symmetrical, triploblastic and coelomate, (c) heart is found on the dorsal surface, (d) respiration through gills. These are suitable for:
(a) Aschelminthes
(b) Mollusca
(c) Echinodermata
(d) Hemichordata
Show Answer & Explanation

Answer: (d) Hemichordata

Explanation:
1. Hemichordates such as Balanoglossus are worm like marine animals with gills and a dorsal heart.

Teacher's Note:
1. They were earlier placed in Chordata.
2. Their body has a proboscis, collar and trunk.

Question 15: A student collected these animals: devil fish, cuttle fish, dog fish, star fish, rat fish, jelly fish, flying fish and silver fish. How many of them are not true fishes?
(a) Four
(b) Three
(c) Five
(d) Two
Show Answer & Explanation

Answer: (c) Five

Explanation:
1. Devil fish, cuttle fish, star fish, jelly fish and silver fish are not true fishes.

Teacher's Note:
1. Dog fish, rat fish and flying fish are true fishes.
2. So five are not true fishes.

Question 16: Osphradium is a sensory structure found in molluscs. It acts as:
(a) Balancing organ
(b) Thermoreceptor
(c) Chemoreceptor
(d) Rheoreceptor
Show Answer & Explanation

Answer: (c) Chemoreceptor

Explanation:
1. Osphradia are chemoreceptors that test the water entering the mantle cavity.

Teacher's Note:
1. Statocysts are balancing organs.
2. They lie near the gills.

Question 17: Which feature is correct for starfish (Asterias) and brittle star (Ophiura)?
(a) Triploblastic and protostomes
(b) Mouth on the dorsal surface and anus on the ventral surface
(c) Excretory system well developed
(d) Sexes are separate and fertilisation is external
Show Answer & Explanation

Answer: (d) Sexes are separate and fertilisation is external

Explanation:
1. Echinoderms have separate sexes, and fertilisation is external in water.

Teacher's Note:
1. They are deuterostomes with the mouth on the ventral (oral) side and the anus on the dorsal side, and they have no excretory system.
2. Their development is indirect with a free swimming larva.

Question 18: Which group of animals belongs to the same phylum?
(a) Balanoglossus, Saccoglossus, Amphioxus
(b) Asterias, Antedon, Ophiura
(c) Prawn, Pila, Pinctada
(d) Asterias, Antedon, Dentalium
Show Answer & Explanation

Answer: (b) Asterias, Antedon, Ophiura

Explanation:
1. Asterias, Antedon and Ophiura are all echinoderms.

Teacher's Note:
1. Amphioxus is a cephalochordate, Pila and Pinctada are molluscs, and prawn is an arthropod.
2. Dentalium is a mollusc.

Question 19: The "proboscis gland" is the excretory organ of the phylum:
(a) Arthropoda
(b) Mollusca
(c) Annelida
(d) Hemichordata
Show Answer & Explanation

Answer: (d) Hemichordata

Explanation:
1. Hemichordates like Balanoglossus excrete by the proboscis gland.

Teacher's Note:
1. Arthropods use Malpighian tubules, and molluscs use kidneys.
2. Annelids use nephridia.

Question 20: Which one is not an economically important insect?
(a) Apis
(b) Aedes
(c) Laccifer
(d) Bombyx
Show Answer & Explanation

Answer: (b) Aedes

Explanation:
1. Apis gives honey, Bombyx gives silk and Laccifer gives lac, while Aedes is a mosquito that spreads disease.

Teacher's Note:
1. Aedes spreads dengue and chikungunya.
2. The other three are useful insects.

Question 21: I am a fish-like creature with neither parapodia nor a muscular foot. I have no eyes, no jaws, no ventral nerve cord, but many gill slits and a notochord. I am a burrowing marine animal showing ciliary feeding and I have flame cells for excretion. Who am I?
(a) Herdmania
(b) Amphioxus
(c) Balanoglossus
(d) Petromyzon
Show Answer & Explanation

Answer: (b) Amphioxus

Explanation:
1. Amphioxus is a burrowing marine cephalochordate with a notochord from head to tail, ciliary feeding and flame cells (protonephridia).

Teacher's Note:
1. Herdmania is a urochordate, and Petromyzon is a jawless vertebrate with a vertebral column.
2. Balanoglossus has no true notochord.

Question 22: Select the incorrect statement:
(a) In urochordata, notochord is present only in the larval tail
(b) In cephalochordata, notochord is found in the head region only and persists throughout life
(c) In vertebrata, notochord is replaced by the vertebral column in the adult
(d) All vertebrates are chordates but all chordates are not vertebrates
Show Answer & Explanation

Answer: (b) In cephalochordata, notochord is found in the head region only and persists throughout life

Explanation:
1. In cephalochordates the notochord extends from head to tail and persists throughout life, so it is not confined to the head region.

Teacher's Note:
1. The other three statements are correct.
2. Urochordate notochord is seen in the larval tail only.

Question 23: In the classification of Chordata, subphylum A has two divisions, B (without jaws) and Gnathostomata, whose superclasses are Pisces and C. Identify A, B and C.
(a) A = Protochordata, B = Agnatha, C = Tetrapoda
(b) A = Vertebrata, B = Agnatha, C = Tetrapoda
(c) A = Vertebrata, B = Cephalochordata, C = Tetrapoda
(d) A = Craniata, B = Vertebrata, C = Agnatha
Show Answer & Explanation

Answer: (b) A = Vertebrata, B = Agnatha, C = Tetrapoda

Explanation:
1. The subphylum Vertebrata is divided into Agnatha (jawless) and Gnathostomata (with jaws).

Teacher's Note:
1. Gnathostomata has superclasses Pisces and Tetrapoda.
2. Protochordata is a subdivision of the phylum, not a subphylum of vertebrates.

Question 24: Read the statements and find the incorrect one:
(a) Dog fish have teeth that are modified placoid scales
(b) In fighting fish gills are covered by an operculum, while in sting ray gill covering is absent
(c) Air bladder is present in saw fish which regulates buoyancy, while in angel fish air bladder is absent
(d) Mouth of flying fish is terminal while it is ventral in great white shark
Show Answer & Explanation

Answer: (c) Air bladder is present in saw fish which regulates buoyancy, while in angel fish air bladder is absent

Explanation:
1. Saw fish is cartilaginous and has no air bladder, whereas angel fish is a bony fish and has one.

Teacher's Note:
1. The other statements are correct.
2. Cartilaginous fishes sink if they stop swimming.

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