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

Biology & Microbiology

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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

Biology & Microbiology

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).

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology