Which of the following is an example of a chemical inhibitor that can cause seed dormancy?
Gibberellins
Cytokinins
Abscisic acid
Ethylene
Related Questions
Which of the following combinations of factors is MOST LIKELY to break seed dormancy in a species exhibiting combinational dormancy?
Exposure to high temperatures followed by gibberellic acid application.
Scarification followed by exposure to high oxygen levels.
Cold stratification followed by exposure to light.
Soaking in water followed by exposure to ethylene.
Seed dormancy is an important adaptation that prevents premature germination. Which of these is NOT associated with maintaining this dormant state?
Abscisic acid
Phenolic acids
Short-chain fatty acids
Gibberellins
Which of the following promotes seed germination, effectively counteracting seed dormancy?
Abscisic acid
Phenolic acids
Short-chain fatty acids
Gibberellins
The ratio of ABA to GA in a dormant seed is typically high. Which of the following changes during seed germination is MOST directly responsible for shifting this balance and promoting growth?
Increased ABA degradation and decreased GA degradation.
Increased GA biosynthesis and decreased ABA biosynthesis.
Transport of ABA out of the embryo and GA into the embryo.
Inactivation of ABA receptors and activation of GA receptors.
Which of the following substances does not typically contribute to seed dormancy?
Abscisic acid
Phenolic acids
Short-chain fatty acids
Gibberellins
Which one of the following inhibits seed germination for a particular period?
Light
Water
Caron dioxide
Dormancy
Some seeds require a specific duration of light exposure to germinate. If a flash of red light (R) is given, followed immediately by a flash of far-red light (FR), what is the MOST LIKELY effect on germination?
Germination will be stimulated.
Germination will be inhibited.
Germination will be unaffected.
The effect will depend on the seed species.
Seed dormancy is an adaptation that primarily ensures:
Immediate germination upon seed dispersal
Germination under favorable environmental conditions
Prevention of seed predation
Increased seed dispersal distance
For cryopreservation, plant materials are frozen at
A researcher observes that a batch of dormant seeds fails to germinate even after scarification and exposure to favorable conditions. Suspecting the presence of a volatile inhibitor, which experimental setup is MOST appropriate to confirm this hypothesis?
Grind the dormant seeds and apply the extract to non-dormant seeds.
Place the dormant seeds in a closed container with non-dormant seeds of a different species and observe germination rates.
Expose the dormant seeds to high concentrations of ethylene gas.
Soak the dormant seeds in a solution of gibberellic acid.
