The correct sequence of reagents in the Gram stain technique is
a. iodine, alcohol, safranin, crystal violet.
b. safranin, crystal violet, alcohol, iodine.
c. crystal violet, iodine, alcohol, safranin.
d. crystal violet, alcohol, iodine, safranin.
e. alcohol, iodine, crystal violet, safranin.
C
You might also like to view...
What events would lead to directional selection?
_____ a new allele arises that increases fitness _____ a population's main food source changes _____ a population's environment becomes increasingly heterogenous _____ heterozygotes have a fitness advantage over homozygotes
Which of the following results in diploid cells?
a. gametogenesis b. mitosis c. meiosis d. spermatogenesis
The part of the nervous system that is composed of
two parts that are antagonistic to each other is a. the autonomic nervous system. b. the spinal cord. c. the peripheral nervous system. d. the central nervous system. e. none of these.
At rest, neurons exhibit a negative membrane potential. Among the factors that maintain this polarity, assess which is most DIRECTLY responsible for the difference between intracellular and extracellular ion concentrations?
A. passive leakage of K+ ions across the membrane. B. movement of K+ ions through voltage-gated K+ channels. C. passive leakage of Na+ ions across the membrane. D. movement of Na+ ions through voltage-gated Na+ channels. E. movements of negatively charged proteins and nucleic acids across the membrane.