NEET Biology Animal Kingdom MCQs Set 25

Biology Objective Questions and Answers: Animal Kingdom

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Multiple Choice Questions

Question 1: Chemoreceptor in Pila is
(a) Ctenidium
(b) Radula
(c) Osphradium
(d) Statocyst
Show Answer & Explanation

Answer: (c) Osphradium

Explanation:
1. The osphradium is a sensory organ that tests water entering the mantle cavity.
2. Ctenidium is the gill and statocyst is for balance.

Teacher's Note:
1. Osphradium senses chemicals in water.

Question 2: Centipede and millipede are included in classes
(a) Insecta and Crustacea
(b) Crustacea and Arachnida
(c) Chilopoda and Diplopoda
(d) Diplopoda and Crustacea
Show Answer & Explanation

Answer: (c) Chilopoda and Diplopoda

Explanation:
1. Centipede belongs to Chilopoda and millipede to Diplopoda.
2. Both are myriapods.

Teacher's Note:
1. Centipede has one pair of legs per segment, millipede two.

Question 3: Coxal glands are the excretory organs of
(a) Crayfish
(b) Devil fish
(c) Jelly fish
(d) Scorpion
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Answer: (d) Scorpion

Explanation:
1. Scorpions and other arachnids excrete through coxal glands.
2. Crustaceans use green glands and insects use Malpighian tubules.

Teacher's Note:
1. Green glands = prawn and crayfish.

Question 4: Most adult insects have six legs and
(a) Two antennae and four wings
(b) Four antennae and four wings
(c) Two antennae and two or four wings
(d) Four wings and four eyes
Show Answer & Explanation

Answer: (c) Two antennae and two or four wings

Explanation:
1. An adult insect has three pairs of legs, one pair of antennae and usually one or two pairs of wings.
2. Not all insects have four wings.

Teacher's Note:
1. Insects have three body regions: head, thorax and abdomen.

Question 5: The first flying animals on earth were
(a) Insects
(b) Birds
(c) Reptiles
(d) Mammals
Show Answer & Explanation

Answer: (a) Insects

Explanation:
1. Insects were the first animals to develop flight.
2. Birds and mammals came much later.

Teacher's Note:
1. Insects are the largest class of animals.

Question 6: In Hydra, waste material of food digestion and nitrogenous waste are removed respectively from
(a) Mouth and mouth
(b) Body wall and body wall
(c) Mouth and body wall
(d) Mouth and tentacles
Show Answer & Explanation

Answer: (c) Mouth and body wall

Explanation:
1. Hydra has a single opening so undigested food leaves through the mouth, while ammonia diffuses through the body wall.
2. Hydra has no excretory organs.

Teacher's Note:
1. Hydra is ammonotelic.

Question 7: Which of the following animals are matched with their respiratory organs correctly? A. Silver fish - trachea; B. Scorpion - book lung; C. Sea squirt - pharyngeal gills; D. Dolphin - skin
(a) A and D
(b) A, B and C
(c) B and D
(d) C and D
Show Answer & Explanation

Answer: (b) A, B and C

Explanation:
1. Silverfish breathe by tracheae, scorpions by book lungs and sea squirts by pharyngeal gills.
2. Dolphin is a mammal and breathes with lungs.

Teacher's Note:
1. Match animal and respiratory organ: fishes gills, insects tracheae, mammals lungs.

Question 8: In contrast to annelids, platyhelminthes show
(a) Absence of body cavity
(b) Presence of pseudocoel
(c) Radial symmetry
(d) Bilateral symmetry
Show Answer & Explanation

Answer: (a) Absence of body cavity

Explanation:
1. Flatworms are acoelomate, whereas annelids are true coelomates.
2. Both have bilateral symmetry.

Teacher's Note:
1. Platyhelminthes are the first bilaterally symmetrical triploblastic animals.

Question 9: Which is NOT correctly matched?
(a) Culex pipiens - Filariasis
(b) Aedes aegypti - Yellow fever
(c) Anopheles culicifacies - Leishmaniasis
(d) Glossina palpalis - Sleeping sickness
Show Answer & Explanation

Answer: (c) Anopheles culicifacies - Leishmaniasis

Explanation:
1. Anopheles transmits malaria; leishmaniasis is spread by sand flies.
2. The other pairs are correct.

Teacher's Note:
1. Culex = filariasis, Aedes = dengue, yellow fever, Anopheles = malaria.

Question 10: The canal system is a characteristic feature of
(a) Sponges
(b) Helminthes
(c) Echinoderms
(d) Coelenterates
Show Answer & Explanation

Answer: (a) Sponges

Explanation:
1. Water canal system is a hallmark of sponges.
2. Echinoderms have water vascular system.

Teacher's Note:
1. Sponges have ostia, spongocoel and osculum.

Question 11: Which of the following is pseudocoelomate?
(a) Hydra
(b) Periplaneta
(c) Ascaris
(d) Pheretima
Show Answer & Explanation

Answer: (c) Ascaris

Explanation:
1. Ascaris (Aschelminthes) has a pseudocoelom.
2. Hydra is acoelomate and others are coelomate.

Teacher's Note:
1. Pseudocoelom is not lined by mesoderm on all sides.

Question 12: Which group is made up of deuterostomes?
(a) Annelida, Arthropoda, Mollusca
(b) Echinodermata, Hemichordata, Chordata
(c) Annelida, Mollusca, Chordata
(d) Arthropoda, Mollusca, Echinodermata
Show Answer & Explanation

Answer: (b) Echinodermata, Hemichordata, Chordata

Explanation:
1. In deuterostomes the blastopore becomes the anus.
2. Echinoderms, hemichordates and chordates are deuterostomes.

Teacher's Note:
1. Others are protostomes.

Question 13: The intermediate host of Schistosoma is
(a) Snail
(b) Mosquito
(c) Housefly
(d) Lion
Show Answer & Explanation

Answer: (a) Snail

Explanation:
1. Snails host larval stages of the blood fluke Schistosoma.
2. Fasciola also uses snail.

Teacher's Note:
1. Schistosoma causes bilharzia.

Question 14: Which phylum is correctly matched with its general characteristics?
(a) Porifera - Cellular level of organisation and external fertilisation
(b) Coelenterata - Diploblastic and mostly asymmetric
(c) Aschelminthes - Pseudocoelomates and dioecious
(d) Hemichordata - Coelomates and closed circulatory system
Show Answer & Explanation

Answer: (c) Aschelminthes - Pseudocoelomates and dioecious

Explanation:
1. Round worms are pseudocoelomate and have separate sexes.
2. Cnidarians are radially symmetric and hemichordates have open circulation.

Teacher's Note:
1. Aschelminthes show sexual dimorphism.

Question 15: Which one is a monogenetic parasite?
(a) Trypanosoma
(b) Plasmodium
(c) Entamoeba
(d) Liver fluke
Show Answer & Explanation

Answer: (c) Entamoeba

Explanation:
1. Entamoeba completes its life cycle in a single host.
2. Others need two hosts.

Teacher's Note:
1. Monogenetic = one host; digenetic = two hosts.

Question 16: Which one is NOT hermaphrodite?
(a) Earthworm
(b) Leech
(c) Taenia
(d) Ascaris
Show Answer & Explanation

Answer: (d) Ascaris

Explanation:
1. Ascaris is dioecious with separate sexes.
2. Earthworm, leech and Taenia are monoecious.

Teacher's Note:
1. Female Ascaris is longer than the male.

Question 17: In annelids a larva is usually absent but when present it is called
(a) Tadpole
(b) Planula
(c) Trochophore
(d) Ephyra
Show Answer & Explanation

Answer: (c) Trochophore

Explanation:
1. The trochophore larva is found in marine polychaetes and molluscs.
2. Planula is of cnidarians and ephyra of Aurelia.

Teacher's Note:
1. Trochophore links annelids and molluscs.

Question 18: Excretion in most annelids takes place by
(a) Kidneys
(b) Flame cells
(c) Nephridia
(d) Ciliated funnel
Show Answer & Explanation

Answer: (c) Nephridia

Explanation:
1. Annelids excrete through segmentally arranged nephridia.
2. Flame cells are found in flatworms.

Teacher's Note:
1. Nephridia also regulate water.

Question 19: The larval form of Fasciola hepatica that penetrates the snail is
(a) Metacercaria
(b) Miracidium
(c) Cysticercus
(d) Cercaria
Show Answer & Explanation

Answer: (b) Miracidium

Explanation:
1. The ciliated miracidium swims and enters the snail.
2. Cercaria leaves the snail and forms metacercaria.

Teacher's Note:
1. Sequence: miracidium, sporocyst, redia, cercaria, metacercaria.

Question 20: True coelom appeared first during evolution in
(a) Echinodermata
(b) Annelida
(c) Chordata
(d) Protozoa
Show Answer & Explanation

Answer: (b) Annelida

Explanation:
1. Annelids are the first true coelomates.
2. Annelids also show metamerism.

Teacher's Note:
1. Coelom is mesoderm-lined.

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Practice MCQs for NEET Biology Animal Kingdom

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FAQs

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