What statement best summarizes the nature of scientific inquiry?
A) moral, philosophical, and ethical values will eventually be replaced by rational explanations
B) personal experience, insight, and revelation are as valid as experimental data
C) once experimentally verified, scientific hypothesis becomes scientific fact
D) explanations about nature must be testable in ways that others can repeat
Answer: D) explanations about nature must be testable in ways that others can repeat
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All cells contain
(a) cytoplasm. (b) a cell wall, nucleus, and cytoplasm. (c) DNA, plasma membrane, and cytoplasm. (d) mitochondria, plasma membrane, and cytoplasm.
The main source of fuel for more than 30 minutes of
muscle contraction is a. fatty acids. b. glucose. c. glycogen. d. creatine phosphate. e. glycerol.
Which of the following statements about methyl-directed mismatch repair systems is FALSE?
A. Methyl-directed mismatch repair systems require the concerted actions of several proteins. B. Methyl-directed mismatch repair systems require exonucleases. C. Methyl-directed mismatch repair systems are most often used to correct pyrimidine dimers. D. Methyl-directed mismatch repair systems exist in all species. E. Methyl-directed mismatch repair systems require incorrectly matched base pairs in the DNA.
What structure in the CNS do neurons from olfactory epithelium first transmit action potentials to?
A. amygdala B. accessory olfactory bulb C. olfactory bulb D. cerebral cortex E. cerebellum