Manual WBC count using a hemocytometer
In which cases would you redo the hemocytometer reading?
Answer:
Count the cells in the 4 large corner squares, excluding the cells touching the right and bottom borderlines.
Repeat on the process on the second chamber. Make sure the counts agree within 10% of ea. other. then average the two.
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An F1 organism is always homozygous
Indicate whether the statement is true or false.
Signaling molecules in animals are
a. neurotransmitters. b. hormones. c. pheromones. d. local signaling molecules. e. all of these.
Cells regulate gene expression by
A. producing termination factors. B. turning on DNAase genes. C. adding histones to the DNA. D. limiting the length of time that mRNA is available for translation.
Plants lacking well-developed conducting systems such as mosses, liverworts, and hornworts have been called
A. gametophytes. B. angiosperms. C. bryophytes. D. gymnosperms. E. sporophytes.