An example of commensalism involves which two organisms?
a. acacia trees and ant colonies
b. bacteria and legumes
c. cattle egrets and cattle
d. plants and pollinators
e. tapeworms and pigs
C
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Mitochondria are proposed to have evolved before chloroplasts based on which observation?
A. All organisms have mitochondria and conduct cell respiration. B. Mitochondria are larger, with more complex structures than chloroplasts. C. Mitochondria produced the oxygen found in the atmosphere. D. All eukaryotes have mitochondria, but not all eukaryotes have chloroplasts. E. All prokaryotes have mitochondria, but not all prokaryotes have chloroplasts.
Which factor does not affect temperature variation among geographic locations?
A) latitude B) proximity to water C) elevation D) longitude
Which of the following is the BEST description of evolution as currently understood by modern biologists?
a) Evolution is goal directed. b) Evolution is influenced by the differential survival and reproduction of phenotypes. c) Evolution includes the results of selection for acquired characteristics. d) Evolution is synonymous with the process of mutation. e) Evolution is synonymous with the process of gene flow.
Staphylococcus saprophyticus causes TOXIN-mediated infections of the urinary tract
a. true b. false