Given below are some biological entities: (A) Human RBC (B) Typical bacteria (C) PPLO (D) Typical eukaryotic cell Identify the correct descending order of their sizes.

Step-by-step solution

According to the NCERT textbook: Typical eukaryotic cell size is 10-20 m . Human RBC diameter is about 7.0 m . Typical bacteria size is 1-2 m . PPLO size is about 0.1 m . Arranging them in descending order (largest to smallest): Typical eukaryotic cell > Human RBC > Typical bacteria > PPLO Thus, the correct sequence is (D) > (A) > (B) > (C). Answer: (D) > (A) > (B) > (C)