Platyhelminthes & Aschelminthes — NEET Biology MCQs with Solutions
Free NEET Biology Platyhelminthes & Aschelminthes MCQs with step-by-step solutions (6 questions). Part of Animal Kingdom. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Platyhelminthes & Aschelminthes · easy · theory
Platyhelminthes are commonly called ______ and their excretion is carried out by ______:
A. Ribbon worms; gills
B. Roundworms; nephridia
C. Flatworms; flame cells ✓ Correct
D. Segmented worms; Malpighian tubules
Solution: Flatworms are dorsoventrally flattened; osmoregulation/excretion is by protonephridia (flame cells).
Q2 — Platyhelminthes & Aschelminthes · easy · theory
Aschelminthes (e.g. Ascaris) are commonly called:
A. Comb jellies
B. Flatworms
C. Segmented worms
D. Roundworms ✓ Correct
Solution: Aschelminthes have a circular cross-section — the roundworms.
Q3 — Platyhelminthes & Aschelminthes · medium · theory
Platyhelminthes are ______ while Aschelminthes are ______ with respect to the body cavity:
A. Coelomate; acoelomate
B. Pseudocoelomate; coelomate
C. Both coelomate
D. Acoelomate; pseudocoelomate ✓ Correct
Solution: Flatworms lack a body cavity (acoelomate); roundworms have a pseudocoelom (not lined fully by mesoderm).
Q4 — Platyhelminthes & Aschelminthes · medium · theory
A parasitic flatworm example and a parasitic roundworm example are, respectively:
A. Pheretima; Ancylostoma
B. Taenia (tapeworm); Wuchereria (filaria worm) ✓ Correct
C. Ascaris; Fasciola
D. Planaria; Hirudinaria
Solution: Taenia and Fasciola are flatworms; Ascaris, Wuchereria and Ancylostoma (hookworm) are roundworms.
Q5 — Platyhelminthes & Aschelminthes · hard · theory
Sexual dimorphism (males and females distinct) is a notable feature of:
A. Poriferans
B. Aschelminthes (roundworms) ✓ Correct
C. Platyhelminthes only
D. Cnidarians
Solution: In roundworms, sexes are separate and often show clear dimorphism (e.g. male Ascaris smaller with a curved tail).
Q6 — Platyhelminthes & Aschelminthes · hard · theory
Which set of features is correct for Platyhelminthes?
A. Triploblastic, acoelomate, bilaterally symmetrical, organ-level ✓ Correct
B. Diploblastic, coelomate, radial
C. Acoelomate, radial, tissue-level
D. Triploblastic, coelomate, organ-system level
Solution: Flatworms are the first triploblastic, bilaterally symmetrical, acoelomate animals at the organ level of organisation.