Question

Match the animals given in List-I with their excretory organs in List-II.

• A. a - ii, b - i, c - iv, d - iii
• B. a - i, b - ii, c - iii, d - iv
• C. a - iii, b - iv, c - i, d - ii
• D. a - iv, b - iii, c - ii, d - i

Hint:

Common excretory match-ups: Platyhelminthes = Flame cells; Annelids = Nephridia; Insects = Malpighian tubules; Crustaceans = Green/Antennal glands.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept: Different animal phyla have evolved specialized anatomical structures to carry out osmoregulation and excretion of nitrogenous wastes.
Step 2: Key Formula or Approach: Identify the biological phylum/class of each animal and match it to its characteristic excretory organ.
Step 3: Detailed Explanation:
(a) Leech: Belongs to Phylum Annelida. Annelids primarily excrete through coiled tubular structures called Nephridia (iii).
(b) Locust: An insect belonging to Phylum Arthropoda. Insects excrete predominantly via numerous fine tubules called Malpighian tubules (iv) which empty into the gut.
(c) Liver fluke: A flatworm belonging to Phylum Platyhelminthes. Flatworms utilize specialized ciliated protonephridia known as Flame cells (i) for osmoregulation and excretion.
(d) Balanoglossus: An acorn worm belonging to Phylum Hemichordata. They possess a specialized excretory structure located in the proboscis, simply called the Proboscis gland (ii).
Matching them up yields: a-iii, b-iv, c-i, d-ii.
Step 4: Final Answer: The correct matching corresponds to option (3).