Question:
Study the following and pick up the correct statements:
I. In cockroach plantulae help to walk on smooth surfaces.
II. Contraction of the dorso-longitudinal muscles and relaxation of the dorso-ventral muscles cause depression of wings in cockroach.
III. In fat bodies of cockroach, oenocytes contain symbiotic bacteria.
IV. Anal styles are jointed structures found in cockroaches.
Study the following and pick up the correct statements:
I. In cockroach plantulae help to walk on smooth surfaces.
II. Contraction of the dorso-longitudinal muscles and relaxation of the dorso-ventral muscles cause depression of wings in cockroach.
III. In fat bodies of cockroach, oenocytes contain symbiotic bacteria.
IV. Anal styles are jointed structures found in cockroaches.
Show Hint
Plantulae = adhesive pads; Cerci = sensory/jointed.
Updated On: Jun 6, 2026
- I, II
- II, III
- III, IV
- II, IV
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Concept
Insect anatomy and physiology.
Step 2: Meaning
Evaluating functional statements about Periplaneta americana.
Step 3: Analysis
Plantulae help in locomotion on smooth surfaces (I is correct). Flight muscle contraction mechanisms described for wing depression are correct (II is correct). Anal styles are not jointed in the same manner as cerci, making IV incorrect.
Step 4: Conclusion
Only statements I and II are correct.
Final Answer: (A)
Insect anatomy and physiology.
Step 2: Meaning
Evaluating functional statements about Periplaneta americana.
Step 3: Analysis
Plantulae help in locomotion on smooth surfaces (I is correct). Flight muscle contraction mechanisms described for wing depression are correct (II is correct). Anal styles are not jointed in the same manner as cerci, making IV incorrect.
Step 4: Conclusion
Only statements I and II are correct.
Final Answer: (A)
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