CBSE
Plants having little or no secondary growth are
Grasses
Deciduous angiosperms
Cycads
Conifers
Which of the following properties is shown by cytokinins?
Delay leaf senescence
Cause leaf abscission
Promote seed dormancy
Promote stornatal closing
Which one of the following generally acts as an antagonist to gibberellins?
Zeatin
Ethylene
ABA
IAA
Which one correctly describe reproduction and life cycle of fern?
Spore → Gamete → Prothallus → Sporophyte
Gamete → Spore → Prothallus → Plant
Prothallus → Sporophyte → Gamete → Fern
Sporangia → Spore → Prothallus → Sporophyte → Plant
Pneumatophores occur in
Halophytes
Free-floating hydrophytes
Submerged hydrophytes
Carnivorous plants
Hormone inducing fruit ripening is
Cytokinin
Ethylene
Aabscissic acid
Gibberellic acid
Which of the following is not an auxin?
IM
IBA
Zeatin
NM
Phellogen and phellem respectively denote
Cork and cork cambium
Cork cambium and cork
Secondary cortex and cork
Cork and secondary cortex
Genetic dwarfism can be overcome by
Gibberellin
Ethylene
Auxin
ABA
Sweet potato is a modified
Stem
Adventitious root
Rhizome
Tap root