HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The soil must erode and expose the seed to the sunlight.
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An animal searching for food must disrupt the soil.
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The seed must exert a force to push a shoot up through the soil.
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Another plant must die to make room for the new plant.
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Detailed explanation-1: -Seedlings can only emerge from the soil when they push upward, exerting a force on the soil greater than the downward force of gravity. The turgor pressure inside of the plant cells must be high in order to have enough force to push up on the soil.
Detailed explanation-2: -Seeds need the proper temperature, moisture, air, and light conditions to germinate. All seeds have optimal temperature ranges for germination (Table 1). The minimum temperature is the lowest temperature at which seeds can germinate effectively. The maximum is the highest temperature at which seeds can germinate.
Detailed explanation-3: -The embryo develops into a seedling under favourable conditions. This process of development of seedlings from a seed is called as germination.
Detailed explanation-4: -When the seed absorbs enough water it will exert enough turgor pressure to rip open the seed coat. This will allow the seedling to emerge.