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What is the underground stem of an onion plant called? 

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Important Questions on Changes Around Us

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Stems modified into flat green organs performing the functions of leaves are known as:
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An example of edible underground stem is:
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All seeds grow into new plants.
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If all seeds fall under the parent plant they will grow into very healthy plants.    
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Why do plants scatter their seeds?
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 What are the things a seed needs to start growing?
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Name the three things that a seed requires to germinate.
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 Why do some seeds not grow into a new plant?
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Seeds can germinate without water.    
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Describe the process of germination.
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What is germination? What does a seed require to germinate?
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What does a seed need for germination?
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Which of the following is/are seeds?

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Which of these is not necessary for a seed to start growing?
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Differentiate between seed germination and seed dispersal.