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
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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.
Which of the following is associated with the axial skeleton?
a. humerus b. sacrum c. hyoid bone d. femur
Four of the five choices listed below can isolate
populations. Select the exception. a. geography b. behavior c. time d. gametes e. gene flow
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