Biology
Grade-7
Easy
Question
Pigments are molecules that absorb or reflect specific ___________ of light selectively.
- Array
- Pattern
- Mode
- Wavelength
Hint:
- Different pigments are responsible for different colours of plant parts.
The correct answer is: Wavelength
Wavelength
- Pigments are molecules that absorb or reflect a specific wavelength of light selectively.
- Pigments are molecules that absorb or reflect a specific wavelength of light selectively.
- As chlorophyll is responsible for green colour of plant parts.
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_______________ are reproductive parts of a plant.
- Flowers are present in plants as reproductive parts.
- Flowers have anthers as male reproductive part and stigma as female reproductive part.
_______________ are reproductive parts of a plant.
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- Flowers are present in plants as reproductive parts.
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______________ gives plants their green color; it is the most prominent and prevalent pigment in plants.
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______________ gives plants their green color; it is the most prominent and prevalent pigment in plants.
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- Chlorophyll is the most prominent and relevant pigment in plants.
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______________ is a common carotenoid that gives sunflowers their bright yellow color.
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Under the favorable conditions of light, temperature and water the ____________ begins.
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- Every seed has specific conditions for it's germination.
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Seed germination is slowed, and ___________ development begins when the temperature falls below a moderate level.
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- Low temperature can damage seeds and Stop their germination by development of fungus in them .
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______________ aids in seed rupturing and transforms insoluble food into soluble form for transfer to the embryo.
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- 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 __________.
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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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- Some seeds don't need light for germination as every seed has it's own suitable conditions to germinate for temprature,light and water.
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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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Germination can sometimes come to a halt when the temperature rises above a certain point.
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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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Pick the odd one out.
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- Plumule makes shoot system.
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