Which one feature is common to leech, cockroach and scorpion?

• Nephridia

• Ventral nerve cord

• Cephalization

• Antennae

Which one of the following groups of structures/ organs have similar function? 

• Typhlosole in earthworm, intestinal villi in rat and contractile vacuole in Amoeba.

• Nephridia in earthworm, Malpighian tubules in cockroach and urinary tubules in rat

• Antennae of cockroach, tympanum of frog and clitellum of earthworm

• Incisors of rat, gizzard (proventriculus) cockroach and tube feet of starfish

Pseudostratified epithelium is found in

• seminiferous tubule

• Fallopian tube

• trachea

• kidney tubules

Microvilli of intestinal epithelium are similar in function with 

• typhlosole in earthworm

• hepatic caecae in cockroach

• intestinal caecum in earthworm

• Malpighian tubules in coackroach

Assertion : Pharyngeal nephridia play a role in the conservation of water in the earthworm.

Reason : They help the earthworm in keeping the skin moist for cutaneous respiration.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and small bronchi are known as

• squamous epithelium

• columnar epithelium

• ciliated epithelium

• cuboidal epithelium

Assertion : Gap junctions perform cementing function to keep the neighbouring cells together.

Reason : Tight junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small and big molecules, etc.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : A mutual exchange of sperms occurs between two earthworms during mating.

Reason : Mature sperms and egg cells and nutritive fluid are deposited in cocoons produced by gland cells of clitellum.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and bronchi are known as

• squamous epithelium

• ciliated epithelium

• columnar epithelium

• cubical epithelium

Assertion : In cockroach respiratory gases directly comes in contact with the various organs of the body. 

Reason : Cockroaches do not have respiratory pigment.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false