Phylogeny is deciphered to build phylogenetic trees using
A. the fossil record
B. homology
C. molecular data
D. all of the choices
Ans: D. all of the choices
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Stem cells that can differentiate into any type of tissue but cannot differentiate into a complete organism are ______________ cells
A. totipotent B. pluripotent C. unipotent D. None of the choices is correct.
One of the biggest issues of technology vs. natural selection is the rise of “super bugs”. What is it about our quickly changing world is contributing to this issue?
A) Habitat destruction is bringing more people into contact with pathogens previously isolated from human hosts. B) Jet travel can send an infectious agent around the world in a day or two. C) Climate change might prevent cold temperatures from killing the animal that carried the zoonotic disease (ex: winter killed the fleas that carried the microbe that caused the bubonic plague). D) A&B E) B&C F) All of the above
A structure similar to bulbs but lacking the layers is
called a. stolons. b. rhizomes. c. bulbs. d. corms. e. tubers.
Assume that acid rain has lowered the pH of a particular lake to pH 4.0. What is the hydroxide ion concentration of this lake?
A) 1 × 10-10 mol of hydroxide ions per liter of lake water B) 1 × 10-4 mol of hydroxide ions per liter of lake water C) 4.0 M with regard to hydroxide ion concentration D) 4.0 × 10-4 mol of hydroxide ions per liter of lake water