The interwoven mass of cells that forms large structures such as an earthstar or a mushroom is a
A) mycelium. B) hypha. C) spore. D) septum. E) root.
A
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A change in a nucleotide sequence that results in addition or deletion of a single nucleotide and largely changes the amino acid sequence of the resulting peptide is known as a
A) nonsense mutation. B) silent mutation. C) missense mutation. D) frameshift mutation. E) none of the above
In the life cycle of a flowering plant, the ___
a. sporophyte is dominant b. gametophyte is dominant c. sporophyte initially is dominant and then the gametophyte becomes dominant d. gametophyte is initially dominant and then the sporophyte becomes dominant e. gametophyte and sporophyte are codominant
Which of the following is not true of polymyxins?
A. They are narrow spectrum. B. They are toxic to kidneys. C. They target cell walls. D. They can be used to treat severe urinary tract infections caused by gram-negative bacilli. E. The source is Bacillus polymyxa.
Describe telophase (Select all that apply)
a. sister chromatids cluster on each side of the cell b. chromosomes align along the center of the cell c. DNA is replicated d. centrioles migrate to the poles of cell e. a nuclear envelope reappears