22.
The activities that take place during afterripening include:

23.
The main ecological factors operating on the alpine vegetation include

25.
The wheat plants with infected ears, which emerge out of the boot leaves earlier than the healthy ones, may be uprooted at once and burnt. Tnis practice is called

26.
Match List-I with List-II and select the correct answer:
List-I List-II
a. Chlorophyll- a 1. C55 H74 O6 N4 Mg
b. Chlorophyll - b 2. C55 H70 O6 N4 Mg
c. Chlorophyll - d 3. C55 G72 O5 N4 Mg
d. Bacteriochlorophyll 4. C54 H70 O6 N4 Mg