Which of the following is an example of macroevolution?

A. the origin of horses and donkeys from a common ancestor
B. giraffes with longer necks reaching higher tree branches
C. antibiotic resistance in S. aureus
D. female cardinals preferring males with bright red feathers
E. the beaks of cactus finches changing in size in response to a drought on the Galapagos islands


A. the origin of horses and donkeys from a common ancestor

Biology & Microbiology

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Cell shapes are largely determined by:

A. cytoskeletal protein networks in the cytoplasm. B. adhesion proteins that assemble at cell surfaces. C. a mesh of proteins and polysaccharides in the extracellular matrix. D. cytosolic proteins that assemble into structures called cellular junctions. E. All of these choices are correct.

Biology & Microbiology

Which of the following is associated with the axial skeleton?

a. humerus b. sacrum c. hyoid bone d. femur

Biology & Microbiology

Four of the five choices listed below can isolate

populations. Select the exception. a. geography b. behavior c. time d. gametes e. gene flow

Biology & Microbiology

Who discovered that DNA was the genetic material (or "transforming principle") that could convert nonvirulent R-type Diplococcus pneumoniae bacterium to the virulent S-type?

A) Avery, MacLeod, and McCarty B) Hershey and Chase C) Watson, Crick, Wilkins, and Franklin D) Erwin Chargaff E) Frederick Griffith

Biology & Microbiology