Which individuals are most likely to survive in a given environment?
a. Ones with negative traits
b. Ones with adaptive traits
c. Ones with neutral traits
d. Everyone has an equal chance
Answer: b. Ones with adaptive traits
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Is it as effective to take two antibiotics sequentially for an infection as it is to take them simultaneously, so long as the total length of time of the treatment is the same?
A. No. There's always one specific antibiotic that will be the most effective, and that is the only antibiotic that should be used to treat a particular infection. B. Yes. So long as the length of time is the same, the two treatments should be essentially the same in terms of effectively eliminating the infection. C. No. Taken sequentially, the first antibiotic will select for the small portion of the population that will spontaneously mutate towards resistance. Then, the second antibiotic will do the exact same thing-selecting for resistance to the second drug from the few bacterial cells that remained from the first drug treatment. D. It depends. Provided that the majority of the infectious agent is killed off by the first drug, the likelihood that the few that are left would not also be killed by the second drug is low. However, simultaneous treatment should be more effective at eliminating all the microbes in the shortest time possible, and with the least probability of selection for multiple drug resistance mutations.
The original two Kingdoms that were established to organize living organisms were:a
Protista and Animalia. b. Eukaryotae and Prokaryotae. c. Plantae and Animalia. d. Plantae and Eukarya. e. Eubacteria and Eukarya
The high levels of fasting-phase glucagon promote the release of __________ from adipose tissue and their use as the body's primary fuel.
Fill in the blank(s) with the appropriate word(s).
The net weight of all of the organisms living in an ecosystem is its
A. combined output of metabolism and photosynthesis. B. photosynthesis minus metabolism. C. productivity. D. biomass. E. vital force.