Automated nucleotide sequencing machines detect DNA bands by laser induced ________.
Fill in the blank(s) with the appropriate word(s).
fluorescence
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The first haploid cell in the life cycle of a plant is the:
a. zygote b. gamete c. gametophyte plant d. spore e. spore mother cell
If a pure-breeding wired-hair terrier (WW) is crossed with a pure-breeding smooth-hair terrier (ww), and a puppy with
a wavy hair is produced, the simplest explanation is ____.
a. a mutation has occurred b. hair texture is an X-linked trait c. incomplete dominance d. hair texture is a lethal trait e. codominance
Water soluble hormones ____
a. are derived from cholesterol b. interact with DNA receptors c. include estrogen and testosterone d. pass through target cell membranes e. require second messenger systems
The symplast:a
greatly increases the surface area of the root. b. is a waterproof band surrounding the endodermis. c. is a continuum of living cytoplasm. d. secretes suberin, which waterproofs the cells. e. allows nutrient minerals to move against their concentration gradient