Amanda is presented with a piece of metal and asked to determine its physical
properties. Which of the following groups best represent the physical properties of
metal.
soluble in water, thermal conductivity, low melting point
electrical conductivity, high melting point, soluble in water
thermal conductivity, magnetism, low melting point
magnetism, electrical conductivity, high melting point

The last option is correct.

magnetism, electrical conductivity, high melting point

The following information should be considered:

Magnetism is the property of metal because of which they are attracted by magnets. Metals contains high electrical conductivity that represents they are good conductors of electricity. They also have high melting points in the case when it require high amount of heat to change its solid state into liquid state. In melting, bonds are broken down due to the applicable of heat energy.

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The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait. 

Compound light microscope