Bacteria perform each of the following ecological roles. Which role typically does NOT involve symbiosis?
A) skin commensalist
B) decomposer
C) aggregates with methane-consuming archaea
D) gut mutualist
B
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What do you know about half life? How does it relate to the question?
What will be an ideal response?
The host range of a virus is determined by
A. the type of genetic information the virus contains. B. All of the answer choices are correct. C. the shape of the virus. D. specific receptors on cells it infects. E. the particular life cycle of the virus.
What is the most compelling reason why "protists" are not considered to be a taxonomic group?
A. The organisms often included in this group are very diverse and don't form a cohesive taxon. B. The group includes both prokaryotic and eukaryotic cell types. C. They are too small to be included among the eukaryotes. D. They are not cellular life forms.
The image of the animal shown above caused quite a
media frenzy in recent years due to reports that it was not extinct. What is it? a. blue-footed booby b. ivory billed woodpecker c. dodo bird d. red caucaded woodpecker e. none of these