Animal Kingdom Chapter-Wise Test 25

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following features is incorrect about mammals?

They have a diaphragm for respiration
They are cold-blooded
They possess mammary glands
They have heterodont dentition
2

Mammals are **warm-blooded (homeothermic)**, not cold-blooded (poikilothermic).

Which of the following phyla includes animals that exhibit metamerism?

Mollusca
Annelida
Echinodermata
Platyhelminthes
2

Annelids show true segmentation (metamerism), where the body is divided into repetitive segments.

Which of the following is a correct feature of amphibians?

They have dry, scaly skin
They exhibit direct development
They have a three-chambered heart
They rely solely on lungs for respiration
3

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

Which feature is a characteristic of phylum Ctenophora?

Notochord
Cnidoblasts
Comb plates
Metamerism
3

Ctenophores, or comb jellies, are characterized by the presence of eight comb plates that aid in locomotion.

Which of the following statements about chordates is correct?

All chordates possess a vertebral column
All chordates have a dorsal, hollow nerve cord
All chordates exhibit radial symmetry
All chordates lack pharyngeal gill slits at any stage
2

All chordates possess a **dorsal, hollow nerve cord** at some stage of their development.

Which feature is unique to phylum Ctenophora?

Cnidoblasts
Bioluminescence
Flame cells
Exoskeleton
2

Bioluminescence, the ability to emit light, is a characteristic feature of Ctenophores.

Which of the following statements about amphibians is correct?

They have a four-chambered heart
They excrete uric acid
They have a three-chambered heart
They lay amniotic eggs
3

Amphibians have a **three-chambered heart**, consisting of two atria and one ventricle.

Which of the following is a characteristic feature of phylum Mollusca?

Jointed appendages
Radula for feeding
Water vascular system
Metameric segmentation
2

Molluscs possess a radula, a file-like rasping organ used for feeding.

Which of the following characteristics is incorrect about mammals?

They have a diaphragm for respiration
They are ectothermic (cold-blooded)
They possess mammary glands
They have heterodont dentition
2

Mammals are **warm-blooded (endothermic)**, not cold-blooded (ectothermic).

Which of the following is a characteristic feature of phylum Platyhelminthes?

Pseudocoelomate body cavity
Triploblastic and acoelomate
Complete digestive system
Metameric segmentation
2

Platyhelminthes are triploblastic and acoelomate, meaning they lack a true body cavity.

Performance Summary

Score:

Category Details
Total Attempts:
Total Skipped:
Total Wrong Answers:
Total Correct Answers:
Time Taken:
Average Time Taken per Question:
Accuracy:
0