Angiosperms are different from all other plants because only they have ___________.
A. a life cycle that involves alternation of generations
B. seeds
C. flowers
D. vascular tissue
C. flowers
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Which greenhouse gas can be generated in the guts of cattle?
a. carbon dioxide b. nitrous oxide c. oxygen d. chlorofluorocarbons e. methane
Sporulation generally occurs under which of the following circumstances?
A) when conditions are unfavorable or there are insufficient nutrients B) when microbes are exposed to a new, favorable environment C) when microbes are under little stress and can become dormant D) when resources become highly abundant
A certain biochemical reaction must be coupled to the hydrolysis of at least two ATP molecules (?G = -14.6 kCal) in order to occur. What is a possible ?G for this biochemical reaction?
A. ?G = +8 kCal B. ?G = +16 kCal C. ?G = -8 kCal D. ?G = -16 kCal E. ?G = -14.6 kCal
Tissue necrosis caused by Clostridium perfringens may be distinguished from necrotizing fasciitis in what way?
A) emission of foul-smelling gases from the damaged tissue B) presence of Gram-positive, endospore forming bacilli in the affected area C) emission of foul-smelling gases from the damaged tissue and presence of Gram-positive, catalase-negative cocci in the affected area D) presence of Gram-positive, catalase-negative cocci in the affected area E) presence of Gram-positive, endospore forming bacilli in the affected area and emission of foul-smelling gases from the damaged tissue