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
MCQ Collection
Animal Diversity-I (Invertebrates) MCQs
Practice Animal Diversity-I (Invertebrates) questions with answers and explanations.
In a specimen-based viva, the examiner describes this case: a planarian has a definite head end and can be divided into right and left mirror halves. Choose the concept that fits it best.
Correct Answer: D. bilateral symmetry
A learner makes a note: older zoology texts group rotifers, nematodes, and related forms together because of a shared body cavity type. The missing scientific idea is:
Correct Answer: C. pseudocoelomates with complete gut
A diagram in the course handout shows that older practical classification of protozoans separates amoeboids, flagellates, ciliates, and sporozoans. Identify the related structure or process.
Correct Answer: A. locomotory structures
A student is revising Animal Diversity-I: the thin outer covering of a sponge is formed by flattened cells. What should the student write in the answer sheet?
Correct Answer: C. pinacocytes
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
A lab observation notes that in a flatworm cross-section, tissue fills the region between the gut and body wall instead of a coelom. The observation points to:
Correct Answer: C. parenchyma fills the body space
A snail secretes a shell from a fold of tissue covering the visceral mass. The best answer is:
Correct Answer: D. mantle
While comparing invertebrate groups, a student examines Plasmodium and fails to find cilia, flagella, or pseudopodia in the mature blood stages. The feature being tested is:
Correct Answer: A. absence of typical locomotory organelles in adult stage
In a specimen-based viva, the examiner describes this case: between the outer and inner cell layers of a sponge lies a gelatinous matrix containing amoeboid cells and skeletal elements. Choose the concept that fits it best.
Correct Answer: C. mesohyl
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
For semester exam preparation, consider this situation: a worm from soil is cylindrical, unsegmented, and has a fluid-filled cavity not fully lined by mesoderm. The correct conclusion is:
Correct Answer: A. pseudocoelomate round body