In a forest, trees that get more sunlight grow taller than other nearby trees. This is a form of ______
A. natural selection.
B. directional selection.
C. artificial selection.
D. disruptive selection.
E. stabilizing selection.
B. directional selection.
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Albinism is a recessive disorder in which the skin and hair fail to produce pigment. The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism. The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder.
What is Dawn's genotype?
A. Nn B. nn C. NN D. NN or Nn
Which of the following molecules has the greatest potential energy?
A. ATP B. NADH C. NAD+ D. FAD E. FADH2
In the flower diagram shown above, the item labeled "5" is the
a. receptacle. b. ovule. c. style. d. stigma. e. anther.
Plants that reproduce asexually by growth of a new plant from stems or roots show vegetative propagation.
Answer the following statement true (T) or false (F)