Which statement is correct about cnidarians?

D. They kill the prey with the help of stinging cells

A. They are exclusively freshwater organisms

B. They capture prey using sticky tentacles without venom

C. They digest food externally before ingestion

D. They kill the prey with the help of stinging cells

In adult lamprey the Notochord is _?

A. Replaced by vertebral column

Everyday Science · Zoology & Animal Kingdom · page 19 of 46

Classes of Animals MCQs with Answers

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Classes of Animals MCQs (181–190)

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Past paper MCQs in this chapter · See all past papers

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181.
In Earthworms, the process of respiration is through?
Correct Answer: A. Skin
One-liner
In earthworms, respiration occurs through their skin (cutaneous respiration).
182.
Which of the following does not lay eggs?
Correct Answer: D. Bats
One-liner
Bats do not lay eggs; they are mammals and give birth to live young.
183.
Common characteristics of Hirudinaria are: 1. Setae & parapodia absent 2. Setae are present but parapodia absent 3. Blood suckers are present
Correct Answer: D. 1 and 3
One-liner
Common characteristics of Hirudinaria (leech) are that setae and parapodia are absent and they are blood suckers, i.e., statements 1 and 3 are correct.
184.
Which statement is correct about cnidarians?
Correct Answer: D. They kill the prey with the help of stinging cells
One-liner
Cnidarians kill their prey with the help of stinging cells called cnidocytes.
185.
Which of the following belongs to chordates?
Correct Answer: D. Trout Fish
One-liner
Trout fish belongs to chordates because it possesses a notochord and a dorsal hollow nerve cord, which are defining features of the phylum Chordata.
186.
The biological name of Earthworm is ?
Correct Answer: A. Pheretima posthuma
One-liner
The biological (scientific) name of the earthworm is Pheretima posthuma.
187.
Class Amphibia contains about _ species.
Correct Answer: A. 6150
One-liner
Class Amphibia contains about 6150 species worldwide.
188.
In osteichthyes, _ are well developed and function as lungs.
Correct Answer: B. Swim bladder
One-liner
In osteichthyes (bony fish), the swim bladder is well developed and functions as a lung.
189.
In adult lamprey the Notochord is _?
Correct Answer: B. Persistent
One-liner
In adult lamprey, the notochord is persistent and remains throughout life as the main axial support structure.
190.
Which of the following is a mammal?
Correct Answer: B. Whale
One-liner
The Whale is a mammal because it is warm-blooded, breathes air through lungs, and gives birth to live young which it nurses with milk.

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Classes of Animals MCQs with Answers

Classes of Animals MCQs (181–190)

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