Which of the following mechanisms can drive evolution?
A) Mutations
B) Genetic drift
C) Natural selection
D) All of the above
D
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A culture system with constant environmental conditions maintained through continual provision of nutrient and removal of wastes is called ________ culture system.
A. fed-batch B. semicontinuous C. batch D. continuous
You turn on the shower and check the water temperature with your hand. Your brain is able to monitor increasing temperature because the thermosensitive neurons in your skin
A. transmit action potentials to different brain regions as the water warms up. B. transmit bigger action potentials to the brain as the water warms up. C. gradually adapt to the stimulus. D. transmit action potentials at a greater rate when the water warms up. E. integrate temperature information.
Rickettsiosis is caused by Rickettsia rickettsii, a pathogen that
A) produces powerful exotoxins. B) provokes a severe immune response. C) interferes with the host cell's Krebs cycle. D) infects the lining of blood vessels and leads to leaking of plasma into tissue. E) lyses the host's cells.
What prediction of the runaway model that is never predicted for the good genes mod-el may help to distinguish between both models in natural populations?
What will be an ideal response?