The laboratory of Robert Koch contributed which of the following to the field of microbiology?
a. simple staining technique
b. use of Petri dishes
c. first photomicrograph of bacteria
d. all of the above
Ans: d. all of the above
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Species of the genus Thiobacillus
A. oxidize inorganic sulfur compounds and produce ATP. B. are ubiquitous in soil, freshwater, and marine environments. C. produce acids that leach metals out of ore. D. All of the choices are correct.
Which of the following is TRUE of exotic
species?
a. In general, exotic species do not have predators in their new location. b. An exotic species is a species that evolved in one region but has been introduced to and become established in another. c. An exotic species is often untroubled by competitors. d. An exotic species is often untroubled by parasites and diseases. e. All of these are true.
__________ is the predominant photosynthetic product carried in phloem
a. Glucose b. Cellulose c. Sucrose d. Maltose e. Fructose
What would happen if a mutation created a new allele that decreased fitness?
A) The new allele would spread through the population and decrease the fitness of that population. B) The new allele would decrease the fitness of the individual that possessed it, and that individual would have few or no offspring. C) The new allele would have to change back to an allele of higher fitness so the possessor of that allele could maintain its fitness. D) The individual with the new allele would wait for an environmental change so that its fitness would increase again.