NEET Biology Animal Kingdom MCQs Set 28

Answer: (a) Facilitate the identification of unknown species.

Explanation:
1. The practical purpose of taxonomy is to help identify unknown species through the system of naming and classification.
2. Evolutionary history belongs to phylogeny.

Teacher's Note:
1. Identification is the first aim.

Answer: (b) Wuchereria

Explanation:
1. Wuchereria bancrofti lives in the lymph vessels and lymph nodes and causes filariasis.
2. Taenia lives in the intestine and Plasmodium in blood and liver.

Teacher's Note:
1. It blocks lymph flow.

Answer: (b) Lymph vessels

Explanation:
1. The adult filarial worm lives in the lymphatic vessels of the lower limbs.
2. It causes chronic inflammation and elephantiasis.

Teacher's Note:
1. It is transmitted by Culex.

Answer: (c) Absorption through integument

Explanation:
1. Tapeworms have no digestive tract and absorb digested food from the host through the body surface (integument).
2. They have hooks and suckers to hold on.

Teacher's Note:
1. They are endoparasites.

Answer: (b) Obtains food through general surface

Explanation:
1. The tapeworm lives in the digested food of the host intestine and absorbs it through its body surface.
2. It does not need a digestive system of its own.

Teacher's Note:
1. The body is covered by a tegument.

Answer: (a) Fasciola

Explanation:
1. Fasciola, a trematode, has an incomplete digestive tract with no anus.
2. Pheretima, Periplaneta and Unio have a complete tract.

Teacher's Note:
1. Flatworms have a blind gut.

Answer: (c) Silver fish

Explanation:
1. The silver fish (Lepisma) is an insect.
2. Star fish, cuttle fish and devil fish are non-fish animals of other phyla.

Teacher's Note:
1. Insects have three pairs of legs.

Answer: (c) Silver fish

Explanation:
1. Silver fish is an insect and so belongs to Arthropoda.
2. Star fish is an echinoderm, gold fish a vertebrate and cuttle fish a mollusc.

Teacher's Note:
1. Do not judge a phylum by the name.

Answer: (b) Apis

Explanation:
1. Apis (honey bee) is economically important as it gives honey and wax.
2. Lepisma and aphid are pests, and Aedes is a vector of disease.

Teacher's Note:
1. Others are harmful.

Answer: (c) Spider

Explanation:
1. Spider is an arachnid with four pairs of legs and is not an insect.
2. Ant, mosquito and locust are insects.

Teacher's Note:
1. Insects have three pairs of legs.

Answer: (c) Locust

Explanation:
1. Locust is an insect and has three pairs of legs.
2. Crab and spider have more legs and Planaria has none.

Teacher's Note:
1. Insects are hexapods.

Answer: (a) Excretion

Explanation:
1. Green glands (antennal glands) of crustaceans such as prawn are excretory organs.
2. They are not respiratory organs.

Teacher's Note:
1. Malpighian tubules do this in insects.

Answer: (d) Filaria

Explanation:
1. The female Culex mosquito transmits filariasis.
2. Malaria is spread by Anopheles.

Teacher's Note:
1. Pneumonia and typhoid are bacterial diseases not spread by mosquitoes.

Answer: (d) 3 pairs of Legs MOLLUSCA, ECHINODERMATA

Explanation:
1. Insects have three pairs of legs, a feature present in all of them.
2. Wings are absent in some insects and compound eyes are not universal.

Teacher's Note:
1. So three pairs of legs is the sure feature.

Answer: (d) Both 2 and 3

Explanation:
1. Ctenophora and Echinodermata are exclusively marine.
2. Molluscs have freshwater and land forms.

Teacher's Note:
1. So the answer is both 2 and 3.

Answer: (d) All a,b and c

Explanation:
1. Ctenophores, echinoderms and protochordates are all exclusively marine.
2. All three are correct.

Teacher's Note:
1. Learn this list for NEET.

Answer: (a) Connecting link between Annelida and Arthropoda

Explanation:
1. Neopilina is a living fossil mollusc that links Annelida and Mollusca.
2. It has a segmented body and a trochophore larva.

Teacher's Note:
1. It does not link annelids with arthropods, so (a) is incorrect.

Answer: (b) Statements (a), (b)

Explanation:
1. The arthropod body is covered by a chitinous exoskeleton, and molluscs live on land or in water.
2. A radula is a mollusc feature and prawn is an arthropod.
3. The mollusc body has head, visceral hump and foot.

Teacher's Note:
1. So (a) and (b) only are correct.

Answer: (a) Only i

Explanation:
1. Pinctada is the pearl oyster of Mollusca.
2. Chaetopleura (chiton) is a mollusc and Pila is the apple snail, not a tusk shell.

Teacher's Note:
1. Only row i is correct.

Answer: (a) Dentalium

Explanation:
1. Dentalium (tusk shell) is a mollusc, which is protostomic, bilateral and schizocoelous.
2. Ctenoplana is a ctenophore and Wuchereria and Taenia lack a true coelom.

Teacher's Note:
1. Molluscs are protostomes.

Answer: (b) Presence of Blind sac body plan.

Explanation:
1. Echinoderms are triploblastic and have a complete gut with mouth and anus.
2. They do not have a blind sac body plan.

Teacher's Note:
1. Locomotion is by the water vascular system.

Answer: (d) Water vascular system

Explanation:
1. The water vascular system is the characteristic feature of echinoderms.
2. It helps locomotion, capture of food and respiration.

Teacher's Note:
1. Adults are radially symmetrical.

Answer: (d) Annelida and Mollusca

Explanation:
1. A trochophore larva occurs in annelids and molluscs.
2. This suggests that they are related.

Teacher's Note:
1. Echinoderms have bipinnaria larva.

Answer: (b) Echinodermata

Explanation:
1. Echinoderms have an unsegmented enterocoelom, and the adult is radially symmetrical while the larva is bilateral.
2. Molluscs and annelids are not radial.

Teacher's Note:
1. So Echinodermata is correct.

Answer: (a) Level of organisation

Explanation:
1. Annelids and molluscs both have the organ system level of organisation.
2. Metameric segmentation and calcareous shell are not common.

Teacher's Note:
1. Mollusc circulation is open while annelids have closed circulation.

Answer: (d) Echinodermata

Explanation:
1. The water vascular system is found only in Echinodermata.
2. It is used for locomotion and feeding by tube feet.

Teacher's Note:
1. Starfish is an example.

Answer: (d) Asterias

Explanation:
1. Asterias (starfish) is a deuterostome with enterocoelous coelom.
2. Pila and Aphrodite are protostome molluscs and annelids.

Teacher's Note:
1. Ascaris is a pseudocoelomate.