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NEET • BIOLOGY • ANIMAL KINGDOM
Animal kingdom practice · Hard
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61
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Read the following paragraph.
An insect whose mouthparts are biting and chewing type in the larval condition, while they are siphoning type in the adult and this insect gives an economically important substance during yet another stage of its development.
The insect is
An insect whose mouthparts are biting and chewing type in the larval condition, while they are siphoning type in the adult and this insect gives an economically important substance during yet another stage of its development.
The insect is
View answer and explanation
Correct option: C
Bombyx
Option C (Bombyx) is correct because Bombyx mori (silkworm) has chewing mouthparts as a larva, siphoning mouthparts as an adult (moth), and produces silk.
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Mouth part of mosquito is
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Correct option: A
Sucking and piercing type
Option A is correct because mosquitoes have mouthparts adapted for piercing skin and sucking blood.
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The nerve net of Hydra lacks
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Correct option: D
Directions in impulse
Option D (Directions in impulse) is correct because the nerve net in Hydra lacks a defined direction for impulse transmission, allowing impulses to travel in all directions.
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Assertion (A): Polymorphism is a speciality of coelenterates where alternation in generation occurs
Reason (R): It helps in species dispersal
Reason (R): It helps in species dispersal
View answer and explanation
Correct option: C
Assertion is true but Reason is false
Option C (Assertion is true but Reason is false) is correct because polymorphism is a characteristic of coelenterates, but it's not primarily for species dispersal.
65
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Some structures with their function are given below, mark the wrongly matched one.
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Correct option: B
Pneumatic bones-Skeletal support
Option B (Pneumatic bones-Skeletal support) is correct because pneumatic bones are primarily for reducing weight, not for providing skeletal support.
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Which of the following is not a characteristic feature of kingdom animalia?
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Correct option: A
Storage of carbohydrates as starch
Option A (Storage of carbohydrates as starch) is not a characteristic feature of kingdom Animalia because animals store carbohydrates as glycogen, not starch.
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Animals that do not belong to class-Crustacea include
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Correct option: B
Millipede and Centipede
Option B (Millipede and Centipede) is correct because millipedes and centipedes belong to the class Myriapoda, not Crustacea.
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[A]: Kraits are poisonous snakes.
[R]: Belly scales are small and continuous with dorsals.
[R]: Belly scales are small and continuous with dorsals.
View answer and explanation
Correct option: C
A is true but R is false
Option C is correct because while Kraits are indeed poisonous, the arrangement of their belly scales is not the reason for their toxicity.
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Which of the following is correct with respect to classification of Myxine?
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Correct option: B
Chordata, Vertebrata, Agnatha, Cyclostomata
Option B is correct because Myxine (hagfish) is classified as belonging to the phylum Chordata, subphylum Vertebrata, class Agnatha (jawless fishes), and order Cyclostomata.
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[A]: All invertebrates can keep their body temperature constant all the time.
[R]: Amoeba can also keep its body temperature constant as it has well-defined blood vascular system.
[R]: Amoeba can also keep its body temperature constant as it has well-defined blood vascular system.
View answer and explanation
Correct option: D
Both A and R are false
Option D (Both A and R are false) is correct because invertebrates cannot maintain a constant body temperature, and Amoeba lacks a well-defined blood vascular system.
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One of the characteristic of Hydra is
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Correct option: A
Predation
Option A (Predation) is correct because Hydra is a predatory animal that uses its nematocysts to capture and consume small prey.
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A student was given a specimen to identify on the basis of the characteristics given below.
(i) They are metamerically segmented.
(ii) They have closed circulatory system.
(iii) They have circular and longitudinal muscles for locomotion.
Identify the specimen.
(i) They are metamerically segmented.
(ii) They have closed circulatory system.
(iii) They have circular and longitudinal muscles for locomotion.
Identify the specimen.
View answer and explanation
Correct option: B
Pheretima
Option B (Pheretima) is correct because the characteristics (metameric segmentation, closed circulatory system, circular and longitudinal muscles for locomotion) are all defining features of Pheretima (earthworm).
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What is common among Planaria and Hydra?
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Correct option: C
Both have regenerative capacity
Option C (Both have regenerative capacity) is correct because both Planaria (Platyhelminthes) and Hydra (Cnidaria) exhibit remarkable regenerative abilities.
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The following are found in Taeniasolium, which one is the correct sequence?
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Correct option: A
Onchosphere, hexacanth, cysticercus, matured proglottid, gravid
Option A (Onchosphere, hexacanth, cysticercus, matured proglottid, gravid) is correct as it represents the correct life cycle sequence of Taenia solium.
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Features common to the animals belonging to class-Amphibia and class-Reptilia are
View answer and explanation
Correct option: B
Presence of tympanum, poikilotherms and usually three chambered heart
Option B (Presence of tympanum, poikilotherms and usually three chambered heart) is correct because both amphibians and reptiles possess a tympanum, are poikilotherms, and typically have a three-chambered heart (except crocodiles, which have a four-chambered heart).
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Arms are absent in
View answer and explanation
Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because both sea urchins and sea cucumbers lack arms, unlike their relative, the starfish.
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Excretion in phylum-Porifera is
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Correct option: C
Ammoniotelic
Option C (Ammoniotelic) is correct because sponges excrete nitrogenous waste in the form of ammonia.
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Which of the following statements are true/false?I. In higher phyla cellular level of organisation is seen II. Phylum-Platyhelminthes have cellular level of organisation III. Cellular level of organisation is seen when the cells are not arranged as loose cell aggregates IV. Molluscs exhibit organ system level of organisation Choose the correct option of the following
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Correct option: B
All statements are false
Option B (All statements are false) is correct because the statements provided are incorrect regarding levels of organization in different phyla.
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Characteristic feature which is not common to all animals is?
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Correct option: C
Presence of nerve cells
Option C (Presence of nerve cells) is correct because not all animals have nerve cells (e.g., Porifera).
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Some of the statements are given below
I. Porifera to Echinodermata lack a notochord
II. Platyhelminthes display tissue level organisation
III. Mesoglea is present in coelenterates during development
IV. Aschelminthes are coelomates
Choose the correct options
I. Porifera to Echinodermata lack a notochord
II. Platyhelminthes display tissue level organisation
III. Mesoglea is present in coelenterates during development
IV. Aschelminthes are coelomates
Choose the correct options
View answer and explanation
Correct option: C
I and III are True
Option C (I and III are True) is correct because Porifera to Echinodermata lack a notochord, and mesoglea is present in coelenterates during development.
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Fasciola hepatica is a digenetic parasite. Sheep and snail are two hosts. Snail is
View answer and explanation
Correct option: A
Intermediate host
Option A (Intermediate host) is correct because in the life cycle of Fasciola hepatica, the snail serves as the intermediate host where asexual reproduction and larval development occur.
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Which of the following statements is false?
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Correct option: C
Echinoderms are protostomous coelomates
Option C (Echinoderms are protostomous coelomates) is correct because echinoderms are deuterostomes, not protostomes. In deuterostomes, the blastopore develops into the anus, while in protostomes, it develops into the mouth.
83
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A triploblastic, pseudocoelomate, bilaterally symmetrical human parasite and the transmission is by contact. It is
View answer and explanation
Correct option: B
Hook worm
Option B (Hook worm) is correct because hookworms are triploblastic, pseudocoelomate, bilaterally symmetrical human parasites, and transmission occurs through skin contact.
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[A]: Earthworms obtain oxygen for respiration through moist skin. They do not have respiratory organs.
[R]: They are burrowing in habit.
[R]: They are burrowing in habit.
View answer and explanation
Correct option: B
Both A and R are true and R is not the correct explanation of A
Option B (Both A and R are true and R is not the correct explanation of A) is correct because while both the assertion and reason are true, the reason (burrowing habit) doesn't directly explain why earthworms respire through their skin. Respiration through moist skin is due to cutaneous respiration.
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Venom of viper affects
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Correct option: B
Circulatory system
Option B (Circulatory system) is correct because viper venom primarily affects the circulatory system, causing hemorrhaging and tissue damage.
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Which of the following statements are true?
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Correct option: B
Phylum-Coelentrata-Meandrina belongs to this phylum
Option B (Phylum-Coelentrata-Meandrina belongs to this phylum) is correct because Meandrina (brain coral) is indeed a member of the phylum Coelenterata (Cnidaria).
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Types of salivary glands present in rabbit are
View answer and explanation
Correct option: D
Four
Option D (Four) is correct because rabbits have four types of salivary glands: parotid, mandibular (submaxillary), sublingual, and zygomatic.
88
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Leech secretes, which of the following anticoagulants?
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Correct option: A
Hirudin
Option A (Hirudin) is correct because leeches secrete hirudin, a powerful anticoagulant, to prevent blood clotting while feeding on their host.
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[A]: Chordates have poor regeneration power while non-chordates have good regeneration power.
[R]: Non-chordates have asexual reproduction, so they have good regeneration power.
[R]: Non-chordates have asexual reproduction, so they have good regeneration power.
View answer and explanation
Correct option: A
Both A and R are true and R is the correct explanation of A
Option A is correct because both the assertion and reason are true, and the reason correctly explains why non-chordates have better regeneration power.
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Metachrosis is an animal’s
View answer and explanation
Correct option: C
Ability to change colour
Option C (Ability to change colour) is correct because metachrosis refers to an animal's ability to change color.
Revision notes and key takeaways
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Showing 61-90 of 185 questions