The expression "knee-jerk reaction" refers to someone doing something automatically without thinking. What does this expression mean in biological terms?
A) In the nervous system, this expression implies the involvement of higher brain regions before executing a spinal reflex.
B) In the nervous system, this expression implies the lack of brain input when executing a spinal reflex.
C) This expression implies that the knee-jerk reaction will be shortened in duration following input from higher brain regions.
D) This expression implies that only children exhibit this type of unthinking behavior.
B
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The Calvin cycle provides autotrophs the ability to convert inorganic carbon into biomass and generate energy during this process
Indicate whether the statement is true or false.
How would you label and separate the DNA of unknown methylotrophs in a sample?
A) Incubate the sample with 13C-methane. B) Hybridize the DNA to FISH probes. C) Use DGGE to separate the strands of DNA in the sample. D) Use T-RFLP to identify the methylotroph DNA in the sample.
Which of the following statements about honeybee communication is not correct?
A. The hive is like a giant organism, fixed in location but sending out workers in all directions to forage. B. Returning foragers pass samples of collected food to other workers that surround her upon return. C. The workers use olfactory cues to go out and find food once given a sample by returning foragers. D. Returning foragers use the waggle dance to provide information about the direction of the food source in relationship to the sun. E. The waggle dance can be in direct line with the sun or at various angles to the left or right of the direct line of the sun.
Transformation was discovered by:
a. Francois Jacob. b. Elie L. Wollman. c. Gregor Mendel. d. Joshua Lederberg. e. Fred Griffith.