In 1749, _______ a French naturalist, became one of the first scientists to suggest that closely related species arose from a common ancestor
A. Georges Buffon
B. Charles Lyell
C. Charles Darwin
D. Georges Cuvier
E. James Hutton
A. Georges Buffon
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These antibodies stay attached to the B cell's plasma membrane and serve as receptors for binding with antigen or complement
a. IgA b. IgG c. IgM d. IgE e. Both IgE and IgA
Digestive hormones produced by the wall of the duodenum that control secretions include cholecystokinin and ___________
Fill in the blank(s) with the appropriate word(s).
In a normal fruit fly (Drosophila), the second thoracic segment has wings and the third thoracic segment has halteres (small knobbed structures that act as a balance and guidance system). A mutant fruit fly is identified in which the third thoracic segment produces wings instead of halteres. This abnormal fly has a mutation in which of the following?
A. a homeotic gene B. a segment polarity gene C. a maternal effect gene D. a gap gene
In the case of comparing birds to other vertebrates, having four appendages is
a. a shared ancestral character. b. a shared derived character. c. a character useful for distinguishing the birds from other vertebrates. d. an example of analogy rather than homology.