Based on the fact that CO2 limits photosynthesis in some current environments, what might you conclude about the evolution of photosynthesis?
A. Photosynthesis evolved when environmental concentrations of CO2 were high.
B. CO2 levels likely did not have a bearing on the evolution of photosynthesis.
C. Photosynthesis evolved in a greenhouse.
D. Photosynthesis evolved when environmental concentrations of CO2 were low.
Answer: A
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The Department of Energy is very interested in investigating which organisms compose the gut microbiome of cows, especially in the rumen. Why would the microbes within a cow's rumen be studied by scientists in the Department of Energy?
(Select all correct choices.) A. Scientists want to derive biofuels from cellulose. B. Scientists want to derive biofuels from methane. C. Scientists want to derive biofuels from the lactose in cow's milk.
In sporotrichosis the lesions can remain localized or can spread throughout the body; in the latter case it is referred to as
A. fulminating sporotrichosis. B. systemic sporotrichosis. C. disseminated sporotrichosis. D. extracutaneous sporotrichosis.
One advantage of participating in a biofilm is ____________.
A. the ability to move as a group. B. the ability to share other members’ toxin-degrading secretions. C. increased competition for food. D. the ability to break down neighbor’s scaffolding for food. E. the formation of a colonial organism.
Glycolysis literally means
a. energy producing. b. Embden-Meyerhof. c. sugar producing. d. sugar splitting.