Multiple Choice QuestionsPseudostratified epithelium is found in
seminiferous tubule
Fallopian tube
trachea
kidney tubules
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.
Microvilli of intestinal epithelium are similar in function with
typhlosole in earthworm
hepatic caecae in cockroach
intestinal caecum in earthworm
Malpighian tubules in coackroach
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
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.
C.
If assertion is true but reason is false.
Pharyngeal nephridia occur in three pairs of bunches in the 4th, 5th and 6th segments lying on each side ofthe alimentary canal. The ducts ofthe nephridia of the 6th open into the buccal cavity while the ducts from the nephridia bunches of the 4th and 5th segments open into the pharynx. These ducts carry excretory products from the pharyngeal nephridia into the gut.
Enteronephric condition is an adaptation for the conservation of water which is absorbed by the inner lining of the alimentary canal. Ectonephric nephridia discharge their contents directly to the outside which help the earthworm in keeping the skin moist for cutaneous respiration only. Integumentary nephridia are ectonephric nephridia while, pharyngeal and septal nephridia are enteronephric.
Which one feature is common to leech, cockroach and scorpion?
Nephridia
Ventral nerve cord
Cephalization
Antennae
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
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
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