Explain how microevolution and artificial selection are demonstrated by the wide variety of dog breeds currently in existence
What will be an ideal response?
Artificial selection via breeding has led to considerable variation within dog populations. However, all dogs are believed to be descended from wolves, and despite their variation, all dogs are members of the same species.
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A bacterial cell must have ___________ in order to transfer portions of its chromosome to another cell.
A. an F factor B. a high frequency of combination plasmid C. a recombination factor D. growth enhancement genes E. all of these components
Plant responses to the relative lengths of light and dark periods in their environment during each 24-
hour period are
a. gravitropisms. b. photoperiodisms. c. thigmotropisms. d. circadian rhythms. e. phototropisms.
The most abundant of the circulating white
blood cells are the a. neutrophils. b. macrophages. c. mast cells. d. eosinophils. e. lymphocytes
A(n) ________ group is treated like an experimental group, except for the one variable being tested
Fill in the blank(s) with correct word