An example of <span>nonsubstituted alkane that can exist as one of only two isomers is Butane with molecular formula </span>
<span>.</span>
Isomers are those having the same molecular formula but different chemical structure.
Non-substituted alkane means it is not substituted by any other atom.It has only carbon and hydrogen atoms attached to it.
Pollen is released from the anther and is transferred to the stigma. It's the 3 rd answer that is correct
I think wind might apply an unbalanced force to change speed or direction of the ball
The first option preserved remains.
Hope it helps!
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