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
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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
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
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
For semester exam preparation, consider this situation: an earthworm transports blood through dorsal and ventral vessels rather than open sinuses. The correct conclusion is:
Correct Answer: B. closed circulatory system
A lab observation notes that a flattened annelid has suckers and lacks setae in adult form. The observation points to:
Correct Answer: D. leeches
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
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
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
An earthworm body is divided into repeated ring-like units along its length. The best answer is:
Correct Answer: C. metamerism
A learner makes a note: an octopus releases a dark cloud that distracts predators during escape. The missing scientific idea is:
Correct Answer: B. ink sac
In museum study, a clam feeds by filtering water and does not scrape food from surfaces. The specimen or feature is best linked with:
Correct Answer: A. absence of radula