Where is the primary meristem located?
A. root and stem tips
B. vascular tissue
C. dermal tissue
D. stem tip only
E. woody stem
Answer: A
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Which of the following is true about two-dimensional gel electrophoresis?
A. The first dimension separates proteins based on their size. B. The second dimension separates proteins based on their isoelectric point (pI). C. The first dimension separates proteins based on their density. D. The second dimension separates proteins based on their size. E. The second dimension separates proteins based on their charge.
The reason that starvation during prenatal development raises the risk for cardiovascular and metabolic problems in adulthood is that
A) starvation before birth and cardiovascular and metabolic disorders are all caused by a single mutation. B) metabolism in the fetus shifts to preserve vital organs, accelerating weight gain in childhood. C) lack of nutrients damages the heart in the uterus. D) the child remembers the lack of nutrition in the uterus and eats too much.
__________ promotes senescence and abscission. It also inhibits growth of roots and stems. Fill in the blank(s) with the appropriate word(s)
What happens when the resting potential reaches threshold voltage?
A) Voltage-gated sodium channels close. B) Voltage-gated sodium channels open. C) The sodium-potassium pump is turned on. D) Resting potassium channels close. E) Voltage-gated potassium channels open.