A common screening mechanism used in cloning involves assaying for ?-galactosidase (lacZ) activity, in which ________-colored colonies suggest that a gene has been successfully inserted/cloned
a. blue
b. green
c. red
d. white
Answer: D
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The original differentiation of prokaryotes and eukaryotes was based on structures found in prokaryotes that are lacking in eukaryotes.
Answer the following statement true (T) or false (F)
In the ABC model of flower development in
Arabidopsis thaliana, stamens form when gene(s) __________ is(are) switched on a. A b. A and B c. B and C d. C e. A and B and C
Why is it inaccurate to refer to early synapsids as "mammal-like reptiles"?
A) Mammals did not evolve from synapsids. B) Synapsids do not nest within the clade Reptilia as we define it now. C) The taxon Synapsida is actually polyphyletic. D) The earliest synapsids had no features that we associate with reptiles today. E) Synapsids and reptiles lived on different continents in the late Paleozoic.
Which statement best represents the relationship between respiration and photosynthesis?
A) Respiration occurs only in animals, and photosynthesis occurs only inplants. B) Photosynthesis reverses the biochemical pathways of respiration. C) Respiration stores energy in complex organic molecules, whereas photosynthesis releases it. D) Photosynthesis stores energy in complex organic molecules, whereas respiration releases it. E) Photosynthesis occurs only in the day, and respiration occurs only at night.