During a Zoology practical, a crab must molt because its rigid outer covering limits growth. Select the most accurate identification.
Correct Answer: D. chitinous exoskeleton
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Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
An animal with a hard exoskeleton has paired limbs divided into movable sections. The best answer is:
Correct Answer: A. jointed appendages
A learner makes a note: a practical list includes Nereis to demonstrate parapodia and many bristles. The missing scientific idea is:
Correct Answer: B. Nereis as a polychaete representative
In museum study, an instructor compares annelid segmentation with arthropod body regions. The specimen or feature is best linked with:
Correct Answer: C. tagmatization is weak compared with arthropods
While comparing invertebrate groups, a blood-feeding leech keeps host blood flowing while it feeds. The feature being tested is:
Correct Answer: C. anticoagulant in saliva
A diagram in the course handout shows that a marine worm releases gametes into water and produces swimming larvae. Identify the related structure or process.
Correct Answer: D. separate sexes and external fertilization often occur
For semester exam preparation, consider this situation: a lecturer asks why repeated body compartments helped annelids become efficient burrowers. The correct conclusion is:
Correct Answer: D. segmentation improves locomotion
A lab observation notes that during earthworm digestion, food is stored briefly and then mechanically ground. The observation points to:
Correct Answer: A. crop and gizzard
In a specimen-based viva, the examiner describes this case: an earthworm must keep its skin moist to exchange gases effectively. Choose the concept that fits it best.
Correct Answer: B. cutaneous respiration
A student is revising Animal Diversity-I: internal partitions divide the coelom of an earthworm into segmental compartments. What should the student write in the answer sheet?
Correct Answer: D. septum
During a Zoology practical, an earthworm dissection reveals a brain-like pair of ganglia connected to a ventral nerve cord. Select the most accurate identification.
Correct Answer: D. cerebral ganglia with ventral nerve cord
A marine annelid life cycle includes a small ciliated larva shared with many molluscs. The best answer is:
Correct Answer: A. trochophore larva