Invertebrate Zoology

Starfish has a circulatory system (though poorly developed) without heart. The haemal system in starfish performs the job of a circulatory system and the heart is not required.

Amphibians have the largest known erythrocytes. The greatest length is 40-60 qm in obligate neotanic salamanders.

Oxygen is distributed in the body of cockroaches through network of tubes called trachea.

Butterflies and moths: Siphoning type of mouth parts.

Silkworm grows in size and when the caterpillar is ready to enter the next stage of its life cycle called ‘pupa’, it swings its head from side to side in the form of figure of 8.

Pupa stage in a moth's life cycle is called chrysalis.

Periplaneta americana is cockroach.

Green glands are the excretory organs in crustaceans like prawn, crab, etc.

Anal atyle is present in male cockroach.

There are 10 pairs of spiracles in a cockroach.

This is the correct answer.

It is the larva of mosquito.

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