The first step in the Gram-stain sequence is the application of _______, which is the primary stain
a. safranin
b. crystal violet
c. Gram's iodine
d. Gram's decolorizer
B
Crystal violet is the primary stain used in the Gram-stain sequence.
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Which of the following best describes the ploidy level of the cells found in a fertilized embryo sac?
A) All cells are diploid. B) All cells are triploid. C) All cells are polyploid. D) The ploidy level varies among species. E) There are haploid, diploid, and triploid cells.
The end of a reproductive shoot where a flower develops is called the
a. ovule. b. calyx. c. receptacle. d. filament. e. carpel.
Vegetable oil is different from animal fat in that the phospholipids in vegetable oil have fatty acid tailsthat:a
solidify at room temperature. b. lack double bonds. c. are saturated. d. interact via van der Waals forces. e. bend.
In prokaryotes, an _____ is a group of gene that are regulated together.
Fill in the blank(s) with the appropriate word(s).