A new microbe has been isolated from hot springs in Yellowstone National Park. These cells are extremely thermophilic. In which of the following groups will this organism be classified?
A. Bacteria
B. Protozoa
C. Archaea
D. Helminths
Ans: C. Archaea
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The punctuated equilibrium hypothesis suggests that speciation usually occurs in isolated populations at the edge of a
species’ geographical distribution.
a. True b. False
In systemic acquired resistance, the regulatory protein NPR-1 moves from the cytoplasm to the cell
nucleus, apparently in response to a buildup of ____ in the cytoplasm.
a. ethylene b. brassinosteroids c. oligosaccharins d. jasmonates e. salicylic acid
The familial form of retinoblastoma is characterized by cancer appearing in both eyes relatively early in life. In contrast, the sporadic form is usually unilateral and appears later. What accounts for the difference?
What will be an ideal response?
The honeycreepers are a group of Hawaiian birds with many different species that all evolved from a single species that migrated from the Americas. The speciation of the honeycreepers is most likely to be an example of which pattern of evolution?
a. autopolyploidy b. allopolyploidy c. convergent evolution d. adaptive radiation e. convergent radiation