Hardness is
-the way a mineral breaks under pressure
-the least informative property of a mineral
-measured using the mohs scale
-the way a mineral splits when stressed

measured using the Mohs scale

Explanation:

Hardness is defined as ability of the surface to undergo resist deformation.

The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another.

Color is the least informative property of a mineral.

Mohs scale of hardness gives a rating of 1 to talc which is categorized as most soft and rating of 10 to diamond which is categorized as most hard.

the correct answer is - ability to find a mate

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.