Which of the following is NOT a symbiotic pair of organisms?
A) elk and rumen bacteria
B) orchid and mycorrhizae
C) onions and arbuscules
D) bean plant and Rhizobium
E) sulfur and Thiobacillus
E
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Whales are believed to be products of divergent evolution sharing a common terrestrial ancestor with the modern hippopotamus. One piece of evidence that supports this theory that they were previously terrestrial is the presence of small bones in the tale of the whale believed to be leftovers from a time when whales had hips and lower limbs. What would we call these hips?
a. whale girdles b. homologous structure c. vestigial structures d. archetype features
Energy sources are needed for which of the following processes?
I. reproduction II. growth III. development
a. I and II only b. I and III only c. II only d. II and III only e. I, II, and III
Seven pairs of ribs articulate ________ with the sternum.
Fill in the blank(s) with the appropriate word(s).
The lowest concentration of an antibiotic that prevents growth is the ________.
A. minimal lethal concentration (MLC) B. 50% inhibitory dose C. minimal inhibitory concentration (MIC) D. All of the choices are correct.