Select the correct answer.
which question is testable?
a.
how does changing the amount of water affect the growth of corn?
b.
is it ethical to use human tissue removed during surgery for scientific research?
c.
are you happy with your new job?
d.
will people be disappointed if car insurance rates increase?

A.  How does changing the amount of water affect the growth of corn?

Explanation:

To test this question, all you have to do is buy corn, and keep them all in the same area with the same amount of sunlight, temperature, etc, and only change the amount of water each plant gets.

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

i think its 5049.

i hope this !