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2010 Biology Exam

Lower Kingdoms-Ecology

QuestionAnswer
Races of Humans are unlikely to evolve extensive differences in the future for which of the following reasons? The human races are incompletely isolated
A defining characteristic of allopatric speciation is: Geographic isolation
What would cause this reclassification? The two forms interbreed often in nature, an their offspring have good survival and reproduction
Which of the following factors would NOT contribute to allopatric speciation? Gene flow between the two populations is extensive
Adaptive radiations can be a direct consequence of tour of the following five factors. Select the exception: Genetic Drift
All the following are true statements about prokaryotes except: Prokaryotes are the most important photosynthesizers
If all the bacteria on the earth suddenly disappeared, which of the following would be the most likely direct result? Recycling of the nutrients would be greatly reduced
What were the earliest bacteria like? Anaerobic heterotrophs
A bacterial endospore: Allows certain species to survive harsh environmental conditions
Saprobes are bacteria that: Feed on dead organisms
Bacteria use pili to: Attatch themselves to a source of food or another bacterium
The bacterial plasmid is: A portion of DNA
The bacteria that cause tetanus can be killed only by prolonged heating at temperatures considerably above boiling. This suggests that tetanus bacteria: Secrete endotoxins
Protozoa are heterotrophic. This means they: Obtain energy by feeding on other organisms.
The protozoa that causes malaria is an example of: A parasite
Created by: ScarletRosePetal
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