A certain bacterium infects a plant's upper leaves. A few days later, bacteria of the same species attempt to infect the same plant's roots but are unsuccessful. What process is responsible for the plant's ability to prevent this infection?
A) antivirulence response
B) pathogenesis resistance
C) systemic acquired resistance
D) sequential immunity
C
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Which of the following most correctly describes the whole-genome shotgun technique for sequencing a genome?
A) genetic mapping followed immediately by sequencing B) physical mapping followed immediately by sequencing C) cloning large genome fragments into very large vectors such as YACs, followed by sequencing D) cloning fragments from many copies of an entire chromosome, sequencing the fragments, and then ordering the sequences E) cloning the whole genome directly, from one end to the other
What would result if more than one sperm fertilized an egg?
A. hermaphroditism B. parthenogenesis C. polyploidy D. twins E. haploidy
Which term refers to physiological changes in ectotherms, known to occur when they get used to temperature rising in the summer?
a. estivation b. thermal acclimatization c. hypothermia d. hyperthermia
Which of the following proteins are likely to act as gene activators?
(a) factors X and Y (b) factors X and Z (c) factors Y and Z (d) factor X only