Heat-resistant bacteria that survive pasteurization are
A. fermented.
B. pathogenic.
C. anaerobic.
D. thermoduric.
Ans: D. thermoduric.
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You perform a test cross of the dihybrid AaBb and score the phenotypes of 1000 progeny. Assuming independent assortment, how many of the progeny do you expect to display the dominant phenotype for both the A and B genes?
A) 100 B) 200 C) 250 D) 500 E) 750
Speciation:a
maintains an intermediate phenotype in a stable environment. b. is the formation of a new species from an ancestral population. c. only occurs when a population is geographically isolated. d. is a change in allele frequencies in a population. e. is the end result of macroevolution but not microevolution.
All of the following individuals contributed to the cell theory except:
A) Rudolph Virchow B) Mattias Schleiden C) Linus Pauling. D) Theodor Schwann E) Robert Hooke
Adenine and guanine are classified as ________, whereas cytosine and thymine are classified as ________
a. purines / pyrimidines b. nucleotides / nucleosides c. positive / negative d. DNA / RNA