Animal Kingdom
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which feature is common between birds and mammals?

Oviparity
Feathers
Warm-blooded nature
Lungs with air sacs
3

Both birds and mammals are warm-blooded, meaning they can regulate their body temperature.

Which of the following is a distinguishing characteristic of reptiles?

Moist skin
Presence of feathers
Cornified, dry skin with epidermal scales
Metamorphosis in life cycle
3

Reptiles have dry, cornified skin covered with epidermal scales or scutes, adapted for terrestrial life.

Which of the following structures is associated with osmoregulation in platyhelminthes?

Malpighian tubules
Nephridia
Flame cells
Green glands
3

Flame cells in platyhelminthes help in excretion and osmoregulation.

Which of the following animals belongs to class Reptilia?

Hyla
Ichthyophis
Chelone
Neophron
3

Chelone (turtle) belongs to class Reptilia, which is characterized by dry, cornified skin with epidermal scales.

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 phylum is characterized by the presence of a mantle and a shell?

Annelida
Mollusca
Arthropoda
Hemichordata
2

Molluscs have a body covered by a calcareous shell and a mantle that secretes the shell.

Which of the following is incorrect about mammals?

They possess mammary glands
They are homeothermic (warm-blooded)
All mammals give birth to live young
They have a diaphragm for respiration
3

Not all mammals give birth to live young. **Monotremes (e.g., platypus) lay eggs**.

Which of the following statements about echinoderms is correct?

They have an open circulatory system
They are triploblastic and coelomate
They have an exoskeleton of chitin
They exhibit bilateral symmetry in adults
2

Echinoderms are triploblastic, coelomate animals with a water vascular system.

Which structure in chordates supports the body during early development?

Vertebral column
Notochord
Spinal cord
Hemocoel
2

The notochord is a flexible rod-like structure that supports the body in chordates during early development (NCERT, Chapter 4, page 55). The vertebral column replaces it in vertebrates, the spinal cord is the nerve cord, and the hemocoel is in arthropods.

Which feature is characteristic of phylum Ctenophora?

Nerve net
Comb plates for locomotion
Water canal system
Segmented body
2

Ctenophores have comb plates, rows of cilia used for locomotion (NCERT, Chapter 4, page 50). Nerve nets are in cnidarians, water canal systems in poriferans, and segmentation in annelids.

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