Addition of `O_2` on ethylene in presence of Ag at `200^(@)`C forms
A) epoxyethame
B) oxirane
C) cyclic ether
D) all of these

Read the following four statement A,B,C and D and select the right option having both correct statements. statements (A) Z scheme of light reaction takes place in presence of PS I only . (B) Only PS I is functional in cyclic photosporylation (C) Cyclic photophosphorylation results into synthesis of ATP and NADPH_(2) (D) Stroma lamellae lack PSII as well as NADP (a) A and B (b) B and C (c) C and D (d) B and D

If O is the circumcentre of /_\ A B C and O D_|_B C , prove that /_B O D=/_A

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_adot

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_Adot

If O is the circumcentre of a A B C and O D_|_B C , prove that /_B O D=/_Adot

A hormone delaying senescence is (a) auxins (b) cytokinin (c) ethylene (d) gibberellin

Abscission zone is characterized by (a) Presence of callose plugs (b) Presence of a distinct layer (c) Activity of celluloses and pectinases (d) All of these

Match the compounds (A) ethanol, (B) methane, (C) ethanoic acid, (D) ethyne and (E) ethene with the descriptions given below: It forms methanol on oxidation in the presence of copper at 200^@C .

The presence of lignin in a cell is a characteristic of (a) Phloem (b) Woody tissue (c) All soft tissues (d) Cork