The first major divergence after the evolution of the first cells was the split between ________ and ________
a. prokaryotes / a common ancestor of archaeans and eukaryotes
b. prokaryotes / eukaryotes
c. archaeans / a common ancestor of prokaryotes and eukaryotes
d. prokaryotes / archaeans
a
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To prepare for a hiking trip in the Appalachian mountains you buy several field guides for the region from a used bookstore. You notice that the older guides list a single species of tiger swallowtail butterfly Papilio glaucus and an Appalachian morph of this species. However the newest guide list two separate species P. glaucus and P. appalachiensis. The authors of this guide state that the biological species concept was used in determining their classifications. What do you think led them to list two separate species of tiger swallowtail?
A. The discovery that P. glaucus and P. appalachiensis interbreed in the wild. B. The discovery that P. glaucus and P. appalachiensis have a genomic similarity of 99%. C. The discovery that P. glaucus and P. appalachiensis do not interbreed in the wild. D. The discovery that P. glaucus and P. appalachiensis have distinct differences in wing coloration. E. The discovery that P. glaucus and P. appalachiensis feed on different host plants.
Solution A has a pH of 6 and solution B has a pH of 8. Which of the following is true regarding the
concentration of hydrogen ions in each solution?
a. A has 100 times greater H+ concentration than B. b. B has 100 times greater H+ concentration than A. c. A has 7/9 of the H+ concentration of B. d. A has 9/7 of the H+ concentration of B. e. A has 1,000 times greater H+ concentration than B.
Those green algae that have large cells with multiple nuclei are termed:
a. multinucleate. b. coenocytic. c. entronucleate. d. diploid. e. haploid.
Actin filaments associate with a nucleotide triphosphate.
a. true b. false