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Note the following:

An insect whose mouthparts are biting and chewing type in the larval condition, while they are siphoning type in the adult and this insect gives an economically important substance during yet another stage of its development.

The insect is:

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Important Questions on Animal Diversity - I (Invertebrate Phyla)

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Study the following:

A. It is a terrestrial arthropod.

B. The prosoma bears a pair of chelicerae, a pair of the pedipalps and four pairs of walking legs.

C. The metasoma ends in a telson.

D. First pair of walking legs are modified as poisonous claws.

Which of the above are true for Heterometrus?

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Study the following is Pheretima:

A. Dorso-intestinal blood-vessels.

B. External intestinal plexus.

C. Internal intestinal plexus.

D. Ventro-intestinal blood vessel.

Arrange the blood vessels in the correct sequence of blood flow from ventral blood vessel to dorsal blood vessel.

The correct sequence is:

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Each male genital opening in Pheretima has separate openings of
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A transverse section of Pheretima taken through the 10th segment is observed under a microscope. Which of the following structures can be observed in the section?
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Which of the following animals is not only a living fossil but also considered as connecting link?
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During the development of zygote of earthworm, macromeres develop into
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Which of the following possesses a hard exoskeleton formed by calcium carbonate?
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Which of the following have the biting and chewing type of mouthparts?

(a) Cimex

(b) Larvae of silk moth

(c) Tsetse fly

(d) Larvae of butterfly

(e) Grasshopper

The correct option is: