Animal Kingdom Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is an example of a jawless fish?

Scoliodon
Hippocampus
Petromyzon
Labeo
3

Petromyzon (lamprey) is a jawless fish belonging to class Cyclostomata.

Which of the following statements about mammals is correct?

All mammals give birth to live young
They have a four-chambered heart
They lack sweat glands
They excrete uric acid
2

Mammals have a four-chambered heart, which ensures efficient oxygenation of blood.

Which of the following statements about birds is incorrect?

They have pneumatic (hollow) bones
They excrete urea as their primary nitrogenous waste
They have a four-chambered heart
They are oviparous
2

Birds are uricotelic, meaning they excrete uric acid, not urea.

Which of the following statements about echinoderms is incorrect?

They exhibit bilateral symmetry in the adult stage
They have a water vascular system
They possess an endoskeleton made of calcareous ossicles
They are exclusively marine
1

Adult echinoderms exhibit radial symmetry, while their larvae are bilaterally symmetrical.

Which structure in mollusks is responsible for locomotion?

Radula
Mantle
Muscular foot
Parapodia
3

Mollusks use their muscular foot for movement, which varies in structure depending on the species.

Which feature is unique to phylum Hemichordata?

Presence of a notochord
Body divided into proboscis, collar, and trunk
Exoskeleton made of chitin
Water vascular system
2

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

Which of the following characteristics is common to both reptiles and birds?

Presence of a four-chambered heart in all members
Laying amniotic eggs
Possession of sweat glands
Having an external ear
2

Both reptiles and birds lay amniotic eggs, which provide protection and a stable environment for the developing embryo.

Which of the following structures in birds reduces their body weight and facilitates flight?

Hollow bones
Cartilaginous skeleton
Lung with air sacs
Thick, heavy beak
1

Birds have hollow (pneumatic) bones, which reduce their body weight and aid in flight.

Which of the following statements about mollusks is correct?

They have a segmented body
They have an open circulatory system except for cephalopods
They have a pseudocoelom
They use Malpighian tubules for excretion
2

Mollusks have an open circulatory system, but cephalopods (e.g., squids and octopuses) have a closed circulatory system.

What is the major functional difference between open and closed circulatory systems?

In a closed circulatory system, blood is pumped into sinuses instead of vessels
An open circulatory system allows direct diffusion of nutrients and gases to tissues
A closed circulatory system is only found in invertebrates
Only vertebrates have an open circulatory system
2

In an open circulatory system (e.g., Arthropods), blood is pumped into open spaces (hemocoel), facilitating direct diffusion of gases and nutrients. In a closed system (e.g., Annelids, Chordates), blood circulates within vessels.

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