Animal Kingdom Chapter-Wise Test 10

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which class of vertebrates is exclusively viviparous?

Aves
Reptilia
Amphibia
Mammalia
4

Mammals are distinguished by their viviparous nature, meaning they give birth to live young.

Which phylum includes animals with a single opening serving as both mouth and anus?

Mollusca
Cnidaria
Echinodermata
Annelida
2

Cnidarians possess a gastrovascular cavity with a single opening that functions as both the mouth and anus.

Which feature is present in all chordates at some stage of their life cycle?

Ventral nerve cord
Open circulatory system
Notochord
Exoskeleton
3

All chordates possess a notochord at some stage, which provides structural support.

Which of the following statements about mollusks is correct?

They have a segmented body
They have an open circulatory system except for cephalopods
They possess a chitinous exoskeleton
They have a water vascular system
2

Mollusks have an open circulatory system, except for cephalopods like squids and octopuses, which have a closed circulatory system.

Why do amphibians undergo cutaneous respiration?

To supplement oxygen intake through lungs
Because they lack lungs
To excrete nitrogenous waste
To regulate body temperature
1

Amphibians use cutaneous respiration (skin breathing) to supplement oxygen intake, especially when submerged in water.

Which of the following statements about bony fishes is correct?

They have a cartilaginous endoskeleton
They possess a swim bladder for buoyancy
They lack an operculum
They exhibit internal fertilization in all species
2

Bony fishes have a swim bladder, which helps maintain buoyancy in water.

Which of the following statements about amphibians is incorrect?

They have a three-chambered heart
They are ectothermic animals
They lay amniotic eggs
They respire through lungs, skin, and gills at different life stages
3

Amphibians lay non-amniotic eggs, usually in water, unlike reptiles, birds, and mammals, which lay or develop amniotic eggs.

Which of the following adaptations helps reptiles conserve water in dry environments?

Thin, moist skin
Cornified, keratinized skin
Gills for respiration
Secretion of ammonia as nitrogenous waste
2

Reptiles have cornified, keratinized skin that reduces water loss, allowing them to survive in dry environments.

Which of the following is a function of the water vascular system in echinoderms?

Excretion
Digestion
Locomotion
Respiration
3

The water vascular system in echinoderms aids in locomotion through tube feet.

Which of the following characteristics is common to both reptiles and birds?

Presence of mammary glands
Possession of scales
Excretion of urea
Cold-blooded nature in all members
2

Both reptiles and birds possess scales, which indicate their evolutionary relationship.

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