During a Zoology practical, a grazing snail scrapes algae from a rock using a ribbon-like toothed organ. Select the most accurate identification.
Correct Answer: B. radula
MCQ Collection
Animal Diversity-I (Invertebrates) MCQs
Practice Animal Diversity-I (Invertebrates) questions with answers and explanations.
In museum study, paramecium shows a large macronucleus for daily functions and a small micronucleus involved in reproduction. The specimen or feature is best linked with:
Correct Answer: D. two types of nuclei
A lab observation notes that a sponge lacks a digestive cavity, so food particles are processed inside cells. The observation points to:
Correct Answer: A. intracellular digestion
A preserved flatworm appears thin from top to bottom and lacks a body cavity. The best answer is:
Correct Answer: A. dorsoventrally flattened body
A diagram in the course handout shows that a roundworm has a separate mouth and anus, allowing one-way movement of food. Identify the related structure or process.
Correct Answer: C. complete digestive tract
A student is revising Animal Diversity-I: a gastropod slowly crawls over a wet surface using a broad ventral structure. What should the student write in the answer sheet?
Correct Answer: C. muscular foot
A learner makes a note: a flagellate living inside a termite gut receives shelter while helping digest cellulose for the host. The missing scientific idea is:
Correct Answer: B. mutualism
For semester exam preparation, consider this situation: a hydra captures prey using specialized stinging cells on its tentacles. The correct conclusion is:
Correct Answer: D. cnidocytes
During a Zoology practical, a planarian removes excess water through branching protonephridial tubules ending in flickering ciliated cells. Select the most accurate identification.
Correct Answer: B. flame cells
While comparing invertebrate groups, a nematode grows but must periodically shed a tough outer covering. The feature being tested is:
Correct Answer: D. cuticle
In a specimen-based viva, the examiner describes this case: a dissected mollusc shows the digestive, reproductive, and excretory organs concentrated in one body region. Choose the concept that fits it best.
Correct Answer: B. visceral mass
Water entering a sponge chamber passes cells with collars and beating flagella that trap food particles. The best answer is:
Correct Answer: D. choanocytes