A culture medium consisting of agar, peptone, and beef heart is a
A) chemically defined medium.
B) complex medium.
C) selective medium.
D) differential medium.
E) reducing medium.
B
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Which of the following statements is true about moss and fern reproduction?
A. Both mosses and ferns require wind for gamete dispersal. B. Mosses require water for fertilization, but ferns do not. C. Both mosses and ferns have a dominant gametophyte generation. D. Both mosses and ferns produce their spores in diploid sporangia. E. Both mosses and ferns have a dependent sporophyte generation.
The large, ancient land mass that contained all the continents is known as ____
a. Laurasia b. Pangea c. Gondwana d. Atlantis e. Europa
According to the second law of thermodynamics, energy cannot be created nor destroyed
__________________ Indicate whether the statement is true or false.
What organization oversees the cleanup of hazardous waste sites in the United States?
A. USDA B. NIH C. EPA D. USGS E. NSF