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  4. Animal Kingdom Chapter-Wise Test 3

Animal Kingdom Chapter-Wise Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is an example of a cephalochordate?

Ascidia
Branchiostoma
Petromyzon
Myxine
2

Branchiostoma (also known as Amphioxus) is a cephalochordate characterized by the presence of a notochord throughout life.

Which of the following features is incorrect regarding mammals?

They possess a diaphragm for respiration
They have an incomplete double circulation
They are warm-blooded
They have heterodont dentition
2

Mammals have a **complete double circulation**, meaning oxygenated and deoxygenated blood do not mix.

Which structure in hemichordates is functionally similar to the notochord?

Proboscis gland
Stomochord
Nephridia
Choanocytes
2

The stomochord in hemichordates is a rod-like structure that functions similarly to the notochord.

Which characteristic is unique to phylum Ctenophora?

Presence of cnidoblasts
Comb plates for locomotion
Metamerism
Chitinous exoskeleton
2

Ctenophores, also known as comb jellies, use comb plates for locomotion.

Which of the following statements about cartilaginous fishes is incorrect?

They have a cartilaginous skeleton
They possess a swim bladder
They have placoid scales
They have a two-chambered heart
2

Cartilaginous fishes **lack a swim bladder**, which is present in **bony fishes** for buoyancy control.

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 type of body symmetry is found in echinoderms during their larval stage?

Radial symmetry
Bilateral symmetry
Asymmetry
None of the above
2

Echinoderms exhibit bilateral symmetry in the larval stage, which later transforms into radial symmetry in adults.

Which of the following is a correct feature of platyhelminthes?

They are diploblastic and acoelomate
They have a well-developed circulatory system
They exhibit bilateral symmetry
They have a complete digestive system
3

Platyhelminthes (flatworms) are **triploblastic**, **acoelomate**, and **bilaterally symmetrical**, but they lack a circulatory system.

Which of the following statements about reptiles is incorrect?

They have a dry, cornified skin with epidermal scales
They have an incomplete double circulation
They excrete urea as the primary nitrogenous waste
Crocodiles have a four-chambered heart
3

Reptiles are **uricotelic**, meaning they excrete **uric acid**, not urea.

Which of the following is a freshwater sponge?

Sycon
Euspongia
Spongilla
Pleurobrachia
3

Spongilla is a freshwater sponge, whereas Sycon and Euspongia are marine sponges.

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