During a Zoology practical, a horticulture note warns that caterpillars of citrus butterfly feed on young citrus leaves. Select the most accurate identification.
Correct Answer: D. citrus butterfly larvae can damage citrus plants
MCQ Collection
BS Zoology Semester Exam MCQs
Practice BS Zoology Semester Exam questions with answers and explanations.
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: (198)
Correct Answer: D. trochophore larva as a developmental link
For a concept-based MCQ, read this case: an arthropod and a nematode are grouped together in modern discussions because both shed an outer cuticle during growth. Select the strongest explanation. (214)
Correct Answer: B. ecdysis of a cuticle
A diagram in the course handout shows that a stalked or feather-armed echinoderm filters food from water currents. Identify the related structure or process.
Correct Answer: D. sea lilies and feather stars
A student is revising Animal Diversity-I: a lab manual lists Euglena, Amoeba, Entamoeba, Plasmodium, Trypanosoma, and Paramecium for slide study. What should the student write in the answer sheet?
Correct Answer: B. prepared slides help study microscopic protists
In a viva, the examiner says: an arthropod and a nematode are grouped together in modern discussions because both shed an outer cuticle during growth. The expected answer is: (199)
Correct Answer: D. ecdysis of a cuticle
For a concept-based MCQ, read this case: a sea star and a chordate are discussed together in a phylogeny lecture even though one is an invertebrate. Select the strongest explanation. (215)
Correct Answer: B. deuterostome development
While comparing invertebrate groups, a sea star can replace a damaged arm, and some species may regrow much of the body if part of the central disc remains. The feature being tested is:
Correct Answer: B. regeneration
In a specimen-based viva, the examiner describes this case: a museum practical asks students to compare sponges, cnidarians, flatworms, molluscs, annelids, arthropods, and echinoderms. Choose the concept that fits it best.
Correct Answer: C. representative phyla show major body plans
In a viva, the examiner says: a sea star and a chordate are discussed together in a phylogeny lecture even though one is an invertebrate. The expected answer is: (200)
Correct Answer: B. deuterostome development
A student wants to avoid rote memorization. After reading that a sponge and a cnidarian are compared in class. the sponge differs most clearly because it has cellular-level organization and choanocyte-based filter feeding., the correct concept is: (216)
Correct Answer: A. cellular-level organization with choanocytes
In museum study, an adult sea star has no clear head end despite active feeding. The specimen or feature is best linked with:
Correct Answer: C. absence of head and cephalization in adults