Animal Kingdom Chapter-Wise Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What type of development is exhibited by amphibians?

Direct development
Indirect development
Viviparous development
Asexual reproduction
2

Amphibians undergo indirect development, where larval stages like tadpoles transform into adults.

Which respiratory structure is unique to birds?

Lungs
Air sacs
Gills
Tracheae
2

Birds have air sacs that facilitate efficient respiration by allowing continuous airflow through the lungs (NCERT, Chapter 4, page 58). Lungs are in many vertebrates, gills in fishes, and tracheae in insects.

Which phylum does the organism Ascaris belong to?

Annelida
Platyhelminthes
Nematoda
Echinodermata
3

Ascaris (roundworm) belongs to phylum Nematoda, characterized by pseudocoelomate, unsegmented bodies (NCERT, Chapter 4, page 51). Annelida includes segmented worms, Platyhelminthes includes flatworms, and Echinodermata includes starfish.

Which characteristic of amphibians limits their distribution to moist environments?

Their dependence on water for respiration
External fertilization and aquatic larval stages
Presence of dry, scaly skin
Complete reliance on lungs for respiration
2

Amphibians require moist environments because they undergo external fertilization and have aquatic larval stages.

Which of the following animals has a three-chambered heart?

Frog
Pigeon
Crocodile
Dog
1

Frogs, belonging to class Amphibia, have a three-chambered heart with two atria and one ventricle.

Which of the following features is present in amphibians but absent in reptiles?

Gills in larval stage
Three-chambered heart
Oviparous nature
Scales on skin
1

Amphibians have gills during their larval stage, while reptiles do not undergo such a transformation.

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 feature in birds aids in excretion of nitrogenous waste?

Urea excretion
Uric acid excretion
Ammonia excretion
Sweat glands
2

Birds are uricotelic, excreting uric acid as their primary nitrogenous waste, which conserves water (NCERT, Chapter 4, page 58). Urea is excreted by mammals, ammonia by fish, and sweat glands are mammalian.

Which feature distinguishes marsupials from other mammals?

Egg-laying
Pouch for young development
Three-chambered heart
Lack of hair
2

Marsupials, like kangaroos, have a pouch where their young complete development after birth (NCERT, Chapter 4, page 59). Egg-laying is in monotremes, mammals have four-chambered hearts, and all mammals have hair.

Which of the following statements about birds is incorrect?

They have a four-chambered heart
They excrete uric acid
They possess mammary glands
They have hollow (pneumatic) bones
3

Birds do not have mammary glands; they lay eggs and feed their young by regurgitation.

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