Animal Kingdom
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is a function of the clitellum in annelids?

Excretion
Reproduction
Respiration
Food digestion
2

The clitellum in annelids secretes mucus that aids in cocoon formation during reproduction.

Which feature distinguishes monotremes from other mammals?

Viviparous reproduction
Presence of hair
Egg-laying (oviparous)
Four-chambered heart
3

Monotremes, like platypus, are oviparous, laying eggs, unlike most mammals which are viviparous or ovoviviparous (NCERT, Chapter 4, page 59). All mammals have hair and four-chambered hearts.

Why do amphibians undergo cutaneous respiration?

To supplement oxygen intake through lungs
Because they lack lungs
To excrete nitrogenous waste
To regulate body temperature
1

Amphibians use cutaneous respiration (skin breathing) to supplement oxygen intake, especially when submerged in water.

Which of the following adaptations is seen in freshwater fishes for osmoregulation?

Excreting concentrated urine
Drinking seawater continuously
Excreting large amounts of dilute urine
Absorbing excess salts from the surrounding water
3

Freshwater fishes excrete large amounts of dilute urine to prevent excess water accumulation and maintain osmotic balance.

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 correctly differentiates between diploblastic and triploblastic animals?

Diploblastic animals lack mesoderm, while triploblastic animals have three germ layers
Diploblastic animals have bilateral symmetry, while triploblastic animals have radial symmetry
Only triploblastic animals show tissue-level organization
Only diploblastic animals exhibit metameric segmentation
1

Diploblastic animals (e.g., Cnidaria) have only two germ layers: ectoderm and endoderm. Triploblastic animals (e.g., Platyhelminthes and above) have an additional mesoderm.

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 is a distinguishing characteristic of phylum Hemichordata?

Notochord present throughout life
Body divided into proboscis, collar, and trunk
Jointed appendages
Water vascular system
2

Hemichordates have a body divided into three regions: proboscis, collar, and trunk.

Which feature in chordates aids in respiration during early development?

Lungs
Pharyngeal gill slits
Tracheae
Spiracles
2

Pharyngeal gill slits are present in chordates during early development and aid in respiration in aquatic forms (NCERT, Chapter 4, page 55). Lungs are in terrestrial vertebrates, tracheae and spiracles in arthropods.

Which mammalian feature aids in thermoregulation?

Scales
Sweat glands
Gills
Clitellum
2

Sweat glands in mammals help regulate body temperature through evaporative cooling (NCERT, Chapter 4, page 59). Scales are in reptiles, gills in fishes, and the clitellum in annelids.

Performance Summary

Score:

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