Multiple Choice QuestionsWhich 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
B.
Nephridia in earthworm, Malpighian tubules in cockroach and urinary tubules in rat
Nephridia in earthworm, malpighian tubules in cockroach and urinary tubules in rat are all excretory in function.
Typhlosole in earthworm is used to increase intestine surface area for more efficient absorption of digested nutrients. Contractile vacuole in Amoeba helps in regulating water content of the cell.
Antennae of cockroach has an important role for studying the multifunctional sensory appendages and for perceiving physical objects. Tympanum of frog transmits sound waves to the middle and inner ear and allows it to hear in both air and below water. Clitellum of earthworms is used in sexual reproduction.
Incisors of rats are open- rooted teeth that grow throughout life. Gizzard or proventriculus of cockroach is the grinding chamber. It can grind the food with swallowed stones and pass it back to the true stomach. Tube feet in starfish is basically used for locomotion, feeding and respiration.
The crystal of lead zirconate is a key component of
sonography
electrocardiography
electroencephalography
magnetoencephalography
Assertion : Leaf butterfly and stick insect show mimicry to dodge their enemies.
Reason : Mimicry is a method to acquire body colour blending with the surroundings.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
Lucocytes (WBCs) are considered as true cells because
they possess nucleus
they do not contain haemoglobin
they show great power of movement
they are responsible forphagocytic activity
The function of microvilli is :
cellular movement
specialized uptake of macro molecules
increase in surface area for absorption
extensive movement of substances over cell surface
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