A learner makes a note: a comb jelly shows features of both radial and bilateral arrangement around its body axis. The missing scientific idea is:
Correct Answer: C. biradial symmetry
Practice Library
All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
In museum study, sea anemones and corals lack a medusa stage and are studied as flower-like cnidarians. The specimen or feature is best linked with:
Correct Answer: A. Anthozoa
While comparing invertebrate groups, hydra and Obelia are commonly placed together in the same cnidarian class in practical zoology. The feature being tested is:
Correct Answer: A. Hydrozoa
A diagram in the course handout shows that after fertilization in many cnidarians, a ciliated larval stage swims before settlement. Identify the related structure or process.
Correct Answer: D. planula larva
For semester exam preparation, consider this situation: a reef-building animal contributes to a hard limestone structure in warm marine water. The correct conclusion is:
Correct Answer: D. corals secrete calcium carbonate skeletons
A lab observation notes that a comb jelly captures prey using sticky cells rather than stinging capsules. The observation points to:
Correct Answer: D. colloblasts
In a specimen-based viva, the examiner describes this case: a transparent marine animal swims by rows of fused cilia that look like shimmering combs. Choose the concept that fits it best.
Correct Answer: D. comb plates
A student is revising Animal Diversity-I: a hydra responds to touch through a diffuse network of neurons rather than a centralized brain. What should the student write in the answer sheet?
Correct Answer: B. nerve net
During a Zoology practical, the body wall of Hydra develops from ectoderm and endoderm with mesoglea between them. Select the most accurate identification.
Correct Answer: D. diploblastic organization
Obelia alternates between an asexual polyp colony and a sexual medusa stage. The best answer is:
Correct Answer: D. metagenesis
A learner makes a note: a jellyfish swims freely with an umbrella-shaped body and tentacles hanging downward. The missing scientific idea is:
Correct Answer: A. medusa form
In museum study, a sea anemone has a cylindrical body attached to the substrate with tentacles directed upward. The specimen or feature is best linked with:
Correct Answer: A. polyp form