Biology
Grade-7
Easy
Question
___________________ is an evolutionary adaptation or a situation in which seeds are unable to germinate even in ideal conditions.
- Seed germination
- Seed reproduction
- Seed dormancy
- Seed imbibition
Hint:
- The condition in which seed is unable to germinate is called as seed dormancy.
The correct answer is: Seed dormancy
Seed dormancy
- Seed dormancy is the adaptation in which a seed is unable to germinate even in ideal conditions.
- The phase in which a seed can't germinate is known as seed dormancy.
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Plant growth regulators are found in some seeds, and they prevent __________.
- Some hormones like abscisic acid and gibberellic acid are present in some seeds which regulates seed germination and plant growth.
Plant growth regulators are found in some seeds, and they prevent __________.
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- Some hormones like abscisic acid and gibberellic acid are present in some seeds which regulates seed germination and plant growth.
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Some seeds do not need light for germination.
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If there is enough temperature but no water for the seed, then still the seed will be able to germinate
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If there is enough temperature but no water for the seed, then still the seed will be able to germinate
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- If there is only one condition is not applicable, the seed will not germinate.
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Germination can sometimes come to a halt when the temperature rises above a certain point.
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- A seed can't germinate in harsh conditions.
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- Plumule makes shoot system.
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Match the following:
- Temperature a. Hydration
- Light b. 25 to 30 ℃
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- Water, oxygen, temperature and light , all the four things are important in germination of seed.
Match the following:
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- Light b. 25 to 30 ℃
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- Water, oxygen, temperature and light , all the four things are important in germination of seed.
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After activation of enzymes in a seed, the metabolic phase begins; this phase I called ___________.
- After imbibition activation of enzymes starts and after the activation lag phase is started.
After activation of enzymes in a seed, the metabolic phase begins; this phase I called ___________.
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- After imbibition activation of enzymes starts and after the activation lag phase is started.
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The seed cell becomes metabolically active, elongates, and divides in the last stage of seed germination, giving rise to the ____________.
- Cells grow , elongate and then decide in last stage of seed germination to give rise seedling.
The seed cell becomes metabolically active, elongates, and divides in the last stage of seed germination, giving rise to the ____________.
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- Cells grow , elongate and then decide in last stage of seed germination to give rise seedling.
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Pick the odd one out.
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- Minerals are required for growth of plant but the other three options are necessary elements for seed germination.
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Pick the odd one out.
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- Radicle makes root system in seed germination.
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Pick the odd one out.
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- The odd option is 'c' because all the other options are showing seed germination while it is showing germination of leaves on an old plant.
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Undeveloped or immature embryo seeds do not _________________.
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Undeveloped or immature embryo seeds do not _________________.
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- Seeds go into dormant state after development untill they don't get appropriate and suitable conditions for germination.
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- Seed of germination is resulted in plant formation.
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Water helps in softening the _______________.
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Water helps in softening the _______________.
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- Water is absorbed by seeds through imbibition so that the seed coat can be soft.
