Two pure-breeding mutant plants produce white flowers. when they are crossed, all of the progeny have wild-type purple flowers. What does this genetic complementation test tell you?

A. The geners are part of distinct biosynthetic pathways

B. the two lines exibit different mutations in the same gene

C. more than one gene is involved in determining the phenotype

D. the allele is pleiotropic

E. The allele exhibits incomplete dominance

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.

wegner's theory did not explain how the continents could move

explanation: