Which cell feature is absent in bacterial cells?
a. ribosomes
b. cytoplasm
c. nucleoid
d. nucleus
e. DNA
ANSWER: d
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Which of the following statements is FALSE concerning enrichment bias?
A) Dilution of the inoculum may help to avoid enrichment bias in some cases. B) Enrichment bias is impossible to overcome in some oligotrophic environments. C) Enrichment bias resulted in the underestimation of prokaryotic diversity. D) Enrichment bias favors organisms that grow quickly.
The most abundant protein on Earth is:
A. chlorophyll. B. cellulose. C. rubisco. D. water. E. keratin.
The model of island biogeography predicts that species richness will increase with decreasing distance from a species source pool. Which do you think would be considered the two most important source pools for a particular island? Select two options.
_____ A small, distant island. _____ A nearby island undergoing primary succession. _____ The closest mainland area. _____ A nearby, large island. _____ A distant, large island with similar habitats.
A mutualistic symbiosis in which fungal hyphae penetrate plant root cells is called a(n) ____
a. rhizobium b. lichen c. arbuscule d. mycorrhiza e. haustorium