Pneumatophores occur in
Halophytes
Free-floating hydrophytes
Submerged hydrophytes
Carnivorous plants
Which one of the following generally acts as an antagonist to gibberellins?
Zeatin
Ethylene
ABA
IAA
C.
ABA
Gibberellins and abscisic Acid (ABA) are antagonistic to each other. Gibberellins promote seed germination whereas ABA promotes seed dormancy.
Phellogen and phellem respectively denote
Cork and cork cambium
Cork cambium and cork
Secondary cortex and cork
Cork and secondary cortex
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
Which of the following properties is shown by cytokinins?
Delay leaf senescence
Cause leaf abscission
Promote seed dormancy
Promote stornatal closing