A normal woman with a color-blind brother:
A. is herself heterozygous for the gene
causing color blindness.
B. has a 50% chance of being heterozygous
for the gene causing color blindness.
C. has a 25% chance of being heterozygous
for the gene causing color blindness.
D. has a 10% chance of being heterozygous
for the gene causing color blindness.
E. cannot carry the gene causing color
blindness.
B
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The central nervous system is lacking in animals that have _____
A) a complete gut B) bilateral symmetry C) radial symmetry D) a closed circulatory system E) excitable membranes
As herbivores adapt to a plant's defenses, the plant will always allocate more and more resources to those defenses to deter the herbivore
A. true B. false
Which of the following statements about RNA polymerase in bacteria is INCORRECT?
A. It binds the promoter region of a gene. B. It is bound to a sigma factor during initiation of transcription. C. It synthesizes RNA. D. It catalyzes the addition of nucleotides to the 5?end of a growing RNA strand. E. It dissociates from the DNA at the terminator.
Parenchyma cells are specialized for all
EXCEPT which of the following activities?
a. photosynthesis b. wound healing c. conduction of food d. secretion e. food storage