Two groups of organisms can occupy the same exact niche
Indicate whether the statement is true or false
false
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Suppose several genes are grouped together in a genome and the group results in a single enzyme. If one of these genes is mutated and the enzyme is no longer active, this gene must be part of _____
A) an intron B) an operon C) a repressor D) an activator E) an inducer
How many chromatids are found in a single human cell at the end of each of the following meiotic stages? ________ prophase I ________ anaphase I ________ prophase II ________ telophase II
What will be an ideal response?
A pure culture contains
A. a variety of species from the same genus. B. only one identified species of microorganism. C. microbes from a single source. D. only bacteria.
Chargaff's rules for the pairing of nitrogen bases is
A. A+T = G+C. B. A = C and G = T. C. A = T and G = C. D. A = G and C = T.