Animal Kingdom Chapter-Wise Test 19

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about mammals is correct?

All mammals lay eggs
They have a four-chambered heart
They lack sweat glands
They excrete uric acid
2

All mammals have a four-chambered heart, which ensures complete separation of oxygenated and deoxygenated blood.

Which of the following is an example of an echinoderm?

Pila
Asterias
Octopus
Limulus
2

Asterias (starfish) belongs to phylum Echinodermata, which includes marine animals with a water vascular system.

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

Exoskeleton
Dorsal hollow nerve cord
Open circulatory system
Triploblastic body
2

All chordates possess a dorsal hollow nerve cord at some stage in their development.

Which type of coelom is present in arthropods?

Acoelomate
Pseudocoelomate
Coelomate
Hemocoelomate
4

Arthropods have a hemocoel, where the body cavity is filled with blood and functions as an open circulatory system.

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

Possession of mammary glands
Endothermy (warm-blooded nature)
Presence of fur or hair
Ability to give birth to live young
2

Both birds and mammals are warm-blooded (endothermic), meaning they maintain a constant internal body temperature.

Which of the following is a correct feature of reptiles?

They are homeothermic (warm-blooded)
They have an incomplete four-chambered heart except for crocodiles
They have moist, glandular skin
They excrete ammonia as their primary nitrogenous waste
2

Reptiles generally have a three-chambered heart with incomplete separation of ventricles, except crocodiles, which have a four-chambered heart.

Which of the following is a characteristic feature of mammals?

Presence of feathers
Ectothermic nature
Hair or fur on the body
Scales covering the entire body
3

Mammals are characterized by the presence of hair or fur, which provides insulation.

Which of the following characteristics is found in birds but not in mammals?

Four-chambered heart
Endothermy
Presence of feathers
Internal fertilization
3

Birds are the only vertebrates that possess feathers, which aid in flight and insulation.

Which of the following statements about fishes is incorrect?

Cartilaginous fishes have a cartilaginous endoskeleton
Bony fishes possess a swim bladder
All fishes breathe through lungs
Cartilaginous fishes lack an operculum
3

Most fishes breathe through gills, not lungs, though some, like lungfish, have specialized respiratory adaptations.

Which of the following statements about Osteichthyes is incorrect?

They have a bony endoskeleton
They possess a two-chambered heart
They lack an operculum
They use a swim bladder for buoyancy
3

Osteichthyes (bony fishes) have an operculum, which covers and protects the gills.

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