PLANTS
PLANT REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Air, water, and warmth.
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Air, roots, seeds.
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Air, seeds, sun.
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Sun, soil, air.
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Detailed explanation-1: -Answer: Solution: Only living seeds can germinate which require optimum conditions like moisture, oxygen and temperature.
Detailed explanation-2: -All seeds need water, oxygen, and proper temperature in order to germinate. Some seeds require proper light also. Some germinate better in full light while others require darkness to germinate.
Detailed explanation-3: -There are three major stages in the germination process. These are the imbibition of water, increased metabolic activity, and swelling of cells. Germination begins with the seed’s imbibition (absorption) of water. Most dormant seeds have 5 to 10 percent moisture content.
Detailed explanation-4: -Water: The poor or additional supply of water affects seed germination. Temperature: This affects the growth rate as well as the metabolism of the seed. Oxygen: Germinating seeds respire vigorously and release the energy required for their growth. Therefore, deficiency of oxygen affects seed germination.
Detailed explanation-5: -Warmth is needed to speed up the chemical reactions that take place in the seed. Warmth also speeds up the making of new cells when the plant embryo is growing. Therefore low soil temperatures for example, will slow down the rate of germination.