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NEETZoologyStructural Organisation in Animals

Read the following statement and choose the option that correctly fills the blanks. In a cockroach, nitrogenous waste is absorbed from the haemolymph by __(A)__, which are lined by __(B)__ cells. The waste is converted into __(C)__ and excreted out through the __(D)__.

Options

  1. A(A) Hepatic caeca, (B) glandular and ciliated, (C) uric acid, (D) midgut
  2. B(A) Malpighian tubules, (B) squamous and cuboidal, (C) urea, (D) hindgut
  3. C(A) Malpighian tubules, (B) glandular and ciliated, (C) ammonia, (D) midgut
  4. D(A) Malpighian tubules, (B) glandular and ciliated, (C) uric acid, (D) hindgut

Correct answer

D. (A) Malpighian tubules, (B) glandular and ciliated, (C) uric acid, (D) hindgut

Step-by-step solution

According to NCERT, in a cockroach, excretion is performed by Malpighian tubules (A). Each tubule is lined by glandular and ciliated cells (B). They absorb nitrogenous waste products from the haemolymph and convert them into uric acid (C), which is then excreted out through the hindgut (D). Hepatic caeca are digestive structures, not excretory. The cellular lining of Malpighian tubules is glandular and ciliated, not squamous or cuboidal. The waste is uric acid, not urea or ammonia, and it exits via the hindgut, not

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