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All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
Choose an option to check your answer.
A.
thread-like antenna with nearly uniform segments
B.
clubbed antenna with enlarged terminal segments
C.
elbowed antenna with a long basal segment
D.
feather-like antenna with many lateral branches
Show Answer
Correct Answer: A. thread-like antenna with nearly uniform segments
Explanation:
Filiform antennae are slender and thread-like, with segments of similar width. They are common in many insects and support general sensory detection.
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A.
producing digestive enzymes
B.
pumping blood into the abdomen
C.
sensory detection of chemicals, touch, humidity, and air movement
D.
chewing solid food only
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Correct Answer: C. sensory detection of chemicals, touch, humidity, and air movement
Explanation:
Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.
Choose an option to check your answer.
A.
producing digestive enzymes
B.
chewing solid food only
C.
sensory detection of chemicals, touch, humidity, and air movement
D.
pumping blood into the abdomen
Show Answer
Correct Answer: C. sensory detection of chemicals, touch, humidity, and air movement
Explanation:
Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.
Choose an option to check your answer.
A.
chewing solid food only
B.
sensory detection of chemicals, touch, humidity, and air movement
C.
pumping blood into the abdomen
D.
producing digestive enzymes
Show Answer
Correct Answer: B. sensory detection of chemicals, touch, humidity, and air movement
Explanation:
Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.
Choose an option to check your answer.
A.
producing digestive enzymes
B.
pumping blood into the abdomen
C.
chewing solid food only
D.
sensory detection of chemicals, touch, humidity, and air movement
Show Answer
Correct Answer: D. sensory detection of chemicals, touch, humidity, and air movement
Explanation:
Insect antennae carry many sensory receptors. They help detect odor, touch, humidity, and other environmental cues, making them important for feeding, mating, and habitat selection.
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A.
movement of hemolymph through spiracles
B.
shedding of the old cuticle to allow growth
C.
production of pheromones by antennae
D.
development of adult wings inside eggs
Show Answer
Correct Answer: B. shedding of the old cuticle to allow growth
Explanation:
Because the exoskeleton cannot expand continuously, insects grow by molting. Ecdysis is the shedding stage in which the old cuticle is cast off.
Choose an option to check your answer.
A.
shedding of the old cuticle to allow growth
B.
development of adult wings inside eggs
C.
movement of hemolymph through spiracles
D.
production of pheromones by antennae
Show Answer
Correct Answer: A. shedding of the old cuticle to allow growth
Explanation:
Because the exoskeleton cannot expand continuously, insects grow by molting. Ecdysis is the shedding stage in which the old cuticle is cast off.
Choose an option to check your answer.
A.
shedding of the old cuticle to allow growth
B.
production of pheromones by antennae
C.
development of adult wings inside eggs
D.
movement of hemolymph through spiracles
Show Answer
Correct Answer: A. shedding of the old cuticle to allow growth
Explanation:
Because the exoskeleton cannot expand continuously, insects grow by molting. Ecdysis is the shedding stage in which the old cuticle is cast off.
Choose an option to check your answer.
A.
shedding of the old cuticle to allow growth
B.
production of pheromones by antennae
C.
movement of hemolymph through spiracles
D.
development of adult wings inside eggs
Show Answer
Correct Answer: A. shedding of the old cuticle to allow growth
Explanation:
Because the exoskeleton cannot expand continuously, insects grow by molting. Ecdysis is the shedding stage in which the old cuticle is cast off.
Choose an option to check your answer.
A.
fusion of gametes during fertilization
B.
chemical hardening and darkening of cuticle after molting
C.
digestion of cellulose in the gut
D.
softening of muscles before flight
Show Answer
Correct Answer: B. chemical hardening and darkening of cuticle after molting
Explanation:
Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.
Choose an option to check your answer.
A.
digestion of cellulose in the gut
B.
chemical hardening and darkening of cuticle after molting
C.
fusion of gametes during fertilization
D.
softening of muscles before flight
Show Answer
Correct Answer: B. chemical hardening and darkening of cuticle after molting
Explanation:
Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.
Choose an option to check your answer.
A.
softening of muscles before flight
B.
chemical hardening and darkening of cuticle after molting
C.
fusion of gametes during fertilization
D.
digestion of cellulose in the gut
Show Answer
Correct Answer: B. chemical hardening and darkening of cuticle after molting
Explanation:
Sclerotization strengthens the cuticle after ecdysis by cross-linking cuticular proteins. It gives insects firm body plates and protective hard parts.
