Animal Kingdom Chapter-Wise Test 21

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the primary function of the water vascular system in echinoderms?

Reproduction
Locomotion and food capture
Excretion
Circulation of nutrients
2

The water vascular system in echinoderms helps in locomotion using tube feet and aids in capturing food.

Which of the following organisms exhibits indirect development?

Earthworm
Hydra
Frog
Lizard
3

Frogs undergo indirect development with a larval stage (tadpole) that metamorphoses into an adult.

Which of the following statements about Aschelminthes (Nematoda) is incorrect?

They are pseudocoelomates
They exhibit radial symmetry
They have a complete digestive system
They have a tough, non-living cuticle
2

Aschelminthes (nematodes) are bilaterally symmetrical, not radially symmetrical.

Which of the following statements about Phylum Porifera is correct?

They have a tissue-level organization
They exhibit intracellular digestion
They have a complete digestive system
They possess cnidoblasts
2

Sponges (Phylum Porifera) exhibit intracellular digestion as they lack a digestive cavity.

Which of the following characteristics is incorrect regarding amphibians?

They have a three-chambered heart
They respire through lungs, skin, and gills at different life stages
They have dry, scaly skin
They exhibit external fertilization in most species
3

Amphibians have moist, glandular skin, not dry and scaly skin, which is a feature of reptiles.

Which feature is found in both reptiles and birds, showing their evolutionary relationship?

Presence of feathers
Scales on the body
Mammary glands
Three-chambered heart
2

Both reptiles and birds possess scales, which indicates their evolutionary connection.

Which of the following animals is a member of phylum Mollusca?

Ascaris
Pheretima
Octopus
Asterias
3

Octopus belongs to phylum Mollusca and is a member of class Cephalopoda.

Which of the following statements about amphibians is correct?

They have dry, scaly skin
They exhibit direct development
They use gills in the adult stage
They have a three-chambered heart
4

Amphibians have a three-chambered heart with two atria and one ventricle.

Which phylum does the animal 'Pleurobrachia' belong to?

Cnidaria
Platyhelminthes
Ctenophora
Echinodermata
3

Pleurobrachia is a ctenophore, characterized by the presence of comb plates used for locomotion.

Which of the following features is incorrect regarding Chondrichthyes?

They have a cartilaginous endoskeleton
They possess an operculum over the gills
They have a two-chambered heart
They lack a swim bladder
2

Chondrichthyes (cartilaginous fishes) do not have an operculum (gill cover); it is a feature of bony fishes (Osteichthyes).

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