Most plant shoots grow toward a source of light. This directional growth in response to light is known as phototropism. The fact that most plants exhibit phototropism indicates that
A.
all parts of a plant will grow toward a light source.
B.
plants can respond to external stimuli.
C.
plants can grow without receiving light energy.
D.
plants cannot respond to stimuli because they lack nerve cells.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

well the answer is 2!