MCQ
Which of the following is not correctly matched?
- ASycon - Canal system
- BStarfish - Radial symmetry
- ✓Ascaris - Flame cell
- DPrawn - Haemocoel
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Column $A$ Column $B$
(i) Oncogenes (1)Causes $AIDS$
(ii) Single circular $DNA$ (2)Lac-Operon concept
(iii) Splicing (3) Component of bacterial chromosome
(iv) Jacob and Monad (4) Processing of $mRNA$ molecules
(5) When activated cause cancer
$(i) (ii) (iii) (iv)$ respectively
$I.$ partial pressure of $O_{2}$
$II.$ partial pressure of $CO _{2}$
$III.$ hydrogen ion concentration
$IV.$ temperature
Choose the correct option

$R$ : Epithelial cells are not secretory in nature.