A squid needs efficient oxygen delivery for fast swimming and active predation. The best answer is:
Correct Answer: B. closed circulatory system
MCQ Collection
Animal Diversity-I (Invertebrates) MCQs
Practice Animal Diversity-I (Invertebrates) questions with answers and explanations.
A diagram in the course handout shows that a segment of an earthworm contains a coiled excretory tubule opening to the outside. Identify the related structure or process.
Correct Answer: C. metanephridia
A student is revising Animal Diversity-I: an insect larva sheds its outer skeleton before increasing in size. What should the student write in the answer sheet?
Correct Answer: B. ecdysis
In museum study, a centipede-like specimen has an elongated body with many leg-bearing segments. The specimen or feature is best linked with:
Correct Answer: A. many trunk segments with legs
A lab observation notes that a round spiny echinoderm lacks arms and has a compact test. The observation points to:
Correct Answer: D. sea urchins and sand dollars
During a Zoology practical, a squid escapes danger by forcefully expelling water through a funnel. Select the most accurate identification.
Correct Answer: D. jet propulsion
While comparing invertebrate groups, a worm has a fluid-filled cavity fully lined by mesoderm and divided by septa. The feature being tested is:
Correct Answer: B. true coelom
In a specimen-based viva, the examiner describes this case: segments of an insect are grouped into head, thorax, and abdomen with different functions. Choose the concept that fits it best.
Correct Answer: C. tagmatization
A learner makes a note: in a spider, the head and thoracic regions are fused into one anterior body region. The missing scientific idea is:
Correct Answer: B. cephalothorax
A student is revising Animal Diversity-I: a chiton clings to rocks and has a shell divided into eight overlapping plates. What should the student write in the answer sheet?
Correct Answer: D. eight dorsal shell plates
In museum study, an earthworm changes body shape by using body-wall muscles against incompressible coelomic fluid. The specimen or feature is best linked with:
Correct Answer: C. hydrostatic skeleton
A lab observation notes that in a grasshopper, hemolymph leaves vessels and bathes organs in body sinuses. The observation points to:
Correct Answer: C. open circulatory system