Influenza differs from the common cold in that
A) it has a greater fatality rate.
B) the virus is not subject to mutation.
C) it can cause seasonal outbreaks.
D) it is not treatable with antivirals.
E) you can get only get influenza once.
Answer: A
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Koch's postulates are criteria used to establish that
A. microbes can be used to clean up toxic spills. B. microbes are found on dust particles. C. life forms can only arise from preexisting life forms. D. a specific microbe should be classified in a specific kingdom. E. a specific microbe is the cause of a specific disease.
Which of the following is NOT true concerning sensory neurons?
a. They collect information about stimuli. b. They lie in the pathway between the interneurons and motor neurons. c. They relay information to the spinal cord. d. They relay information to the brain. e. They are one of three types of neurons.
Which of the following is a true statement about meristems? Select all that apply.A) They can be apical or lateral.B) Meristematic cells divide into two cells, one of which remains a meristem cell and another that becomes a plant body cell.C) Apical meristems give rise to three types of embryonic tissues.D) Meristematic cells are found only in eudicots and not in monocots.E) They are responsible for primary and secondary growth.
What will be an ideal response?
Small RNAs can regulate gene expression. One type, called micro RNA (miRNA), acts by binding directly to
A. mRNA to prevent translation. B. tRNA to prevent transcription. C. mRNA to prevent transcription. D. tRNA to prevent translation.