Megadiversity countries are those countries that
A. have the greatest number of species.
B. have the largest number of endemic plant species.
C. have the highest ecosystem diversity.
D. spend the most money on conservation.
E. contain the highest genetic diversity.
Answer: A
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The life cycle of the human liver fluke has intermediate hosts.
(a) one. (b) two. (c) three. (d) four.
The type of RNA that physically interacts with a ribosome, providing the sequence information for a specific protein, is abbreviated:
A. rRNA. B. siRNA. C. mRNA. D. snRNA. E. tRNA.
Choose the true statements about molecular clocks.
_____ All molecular clocks tick at the same rate. _____ Molecular clocks can be calibrated using fossil evidence. _____ The rate of a molecular clock for a given DNA character might vary depending on how constrained the character is by natural selection. _____ Ultimately, all molecular clocks depend on the rate of DNA mutation and DNA repair mechanisms.
Media that contain a full complement of nutrient substances, including amino acids, and other
chemicals that normal strains use for themselves, is called:
a. agar media. b. minimal medium. c. nutritious media. d. complete medium. e. rich media.