The growth in plants can be measured by
direct method
arc auxanometer
Pfeffer's auxanometer
all of these
Which of the following prevents fall of fruits?
GA3
NAA
Ethylene
Zeatin
The wavelength of light absorbed by Pr form of phytochrome is
640 nm
680 nm
720 nm
620 nm
Flowering dependent on cold treatment is
cryotherapy
cryogenics
cryoscopy
vernalisation
Abscisic acid causes
stomatal closure
stem elongation
leaf expansion
root elongation
A sleep movement in plants is a nastic response, that occurs daily in response to
dark
light
water
both `1' and `2'
What reason will you assign for coconut milk used in tissue culture?
Gibberellins
Cytokinins
Auxins
Ehtylene
Removal of apical bud results in
formation of new apical bud
elongation of main stem
death of plant
formation of lateral branching
Senescence as an active developmental cellular process in the growth and functioning of a flowering plant , is indicated in
vessels and tracheid differentiation
leaf abscission
annual plants
floral parts
Which combination of gases is suitable for fruit ripening?
80% CO2 and 20% CH2
80% CH4 and 20% CO2
80% CO2 and 20% O2
80% C2H4 and 20% CO2
