Domestication of dogs has led to
A. a variety of homologous structures.
B. a variety of different species.
C. a variety of mutations.
D. a variety of phenotypes.
E. a variety of reproductively isolated breeds.
Answer: D
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Saprobes are
a. cytoplasmic organelles. b. metabolic by-products. c. organisms that feed on dead bodies. d. parasites of plants. e. an evolutionary dead end.
An __________ consists of an array of organisms
along with nonliving components of their environment. Fill in the blank(s) with the appropriate word(s).
©McGraw-Hill EducationAssume that the ancestor of this phylogeny had vascular tissue and chlorophyll. If this is true, which answer lists all key traits of a ginkgo?
A. needles, tree, and seeds B. tree and seeds C. seeds, tree, vascular tissue, and chlorophyll D. vascular tissue, needles, tree, and chlorophyll
Interferons alpha and beta are effective against viruses.
Answer the following statement true (T) or false (F)