Which of the following is not an advantage of genetically engineered plants?
Select one:
a. decreased yield
b. herbicide resistance
c. salt tolerance
d. drought tolerance
e. disease protection
a. decreased yield
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The morphological approach to speciation is prone to misinterpretation. Which of the following is not
an example?
a. male birds with strikingly different plumage than females b. a chihuahua and a great dane that do not look alike c. snails that resemble each other, but cannot mate d. snails of quite varied appearance that can all interbreed e. snails of quite similar appearance that are shown to be different species via reproductive isolation
Activities that disrupt the production of melatonin at night also may cause ____
a. heart disease b. cancer c. increasing gonadal output d. pancreas reduction e. too much sleep
What biome includes an environment where the plants are low to the ground and many boggy areas are found?
A) a boreal forest B) a savanna C) a tundra D) a prairie
Researchers often want to isolate a certain type of RNA. For some RNA species, this can be accomplished via affinity chromatography, using beads coated with chains of poly-deoxythymidine (poly-dT). The desired RNA will stick to the beads while unwanted RNAs will flow through the column. The retained RNA can then be eluted. What RNA species can be purified using this method?
A. bacterial mRNA B. eukaryotic mRNA C. eukaryotic rRNA D. bacterial rRNA