Pasteur chose the Latin root word for "virus" meaning
A. non-living.
B. particle.
C. poison.
D. contagious.
E. extremely small.
Answer: C
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Which event could result in speciation?
a. A bird develops a mutation that affects the shape of its feathers. b. A mouse is infected by a virus that changes its feeding cycle. c. A fish produces eggs with DNA transcription errors. d. A horse stretches to reach apples growing from a tall tree.
A microbiologist Gram stains a bacterium and finds the bacterium to be blue to purple in color. This identifies the
A. bacterium as gram-positive. B. bacterium as a disease-causing organism. C. bacterium as an endospore former. D. species of bacterium. E. bacterium as gram-negative.
When an invasive species alters the community structure it is introduced to, what can the consequence be?
a) extinction of economically important species b) reduced predation on some native species c) increased predation on some native species d) all of the above
mutation
What will be an ideal response?