Most adult arthropod organs are bathed by hemolymph in enlarged body sinuses. The best answer is:
Correct Answer: B. hemocoel
MCQ Collection
BS Zoology Semester Exam MCQs
Practice BS Zoology Semester Exam questions with answers and explanations.
In a specimen-based viva, the examiner describes this case: a molluscan embryo passes through a ciliated larval form also seen in annelid life cycles. Choose the concept that fits it best.
Correct Answer: C. trochophore larva
A learner makes a note: a mature earthworm has a swollen glandular band involved in cocoon formation. The missing scientific idea is:
Correct Answer: A. clitellum
For semester exam preparation, consider this situation: a specimen has head, thorax, abdomen, one pair of antennae, and six legs. The correct conclusion is:
Correct Answer: D. three pairs of legs
During a Zoology practical, an insect uses hardened mouthparts to bite and chew solid food. Select the most accurate identification.
Correct Answer: A. mandibles
A lab observation notes that in most molluscs, blood leaves vessels and bathes organs directly in body spaces. The observation points to:
Correct Answer: D. hemocoel in most classes
A marine annelid life cycle includes a small ciliated larva shared with many molluscs. The best answer is:
Correct Answer: A. trochophore larva
A diagram in the course handout shows that a spider-like specimen lacks antennae and has eight walking legs. Identify the related structure or process.
Correct Answer: C. four pairs of legs
A student is revising Animal Diversity-I: a crustacean limb branches into two main rami from a common base. What should the student write in the answer sheet?
Correct Answer: D. biramous appendage
For semester exam preparation, consider this situation: aquatic molluscs exchange gases through comb-like structures in the mantle cavity. The correct conclusion is:
Correct Answer: D. gills called ctenidia
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
While comparing invertebrate groups, a prawn has biramous appendages and two pairs of sensory antennae. The feature being tested is:
Correct Answer: B. two pairs of antennae