An instructor compares earthworms and insects in a unit on metamerism and tagmatization. The best answer is:
Correct Answer: C. segmentation evolved with different outcomes in annelids and arthropods
MCQ Collection
BS Zoology Semester Exam MCQs
Practice BS Zoology Semester Exam questions with answers and explanations.
A teacher gives this comparison: a flatworm and a roundworm are placed side by side. the roundworm is recognized by a cylindrical body, complete gut, and pseudocoelom. The point being tested is: (207)
Correct Answer: D. cylindrical body with pseudocoelom and complete gut
In a viva, the examiner says: a mollusc and an annelid both show trochophore larvae in many species, but their adult body plans are very different. The expected answer is: (223)
Correct Answer: B. trochophore larva as a developmental link
During a Zoology practical, an earthworm grips soil during crawling using tiny bristles projecting from its body wall. Select the most accurate identification.
Correct Answer: B. setae
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
In a specimen-based viva, the examiner describes this case: a crab exchanges gases using feathery structures associated with appendages under the carapace. Choose the concept that fits it best.
Correct Answer: A. gills
A learner makes a note: a sea star larva swims with right and left sides before developing into a radial adult. The missing scientific idea is:
Correct Answer: C. bilateral larvae
A student is revising Animal Diversity-I: nereis swims and crawls with paired fleshy lateral extensions bearing many bristles. What should the student write in the answer sheet?
Correct Answer: B. parapodia
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
A lab observation notes that a caterpillar transforms into a pupa and then an adult butterfly. The observation points to:
Correct Answer: D. metamorphosis
A zoology teacher links echinoderms with chordates based on early embryonic development. The best answer is:
Correct Answer: A. deuterostome affinity
In a specimen-based viva, the examiner describes this case: a segmented soil animal improves soil aeration and has few setae but no parapodia. Choose the concept that fits it best.
Correct Answer: A. earthworm