The rocky area at the bottom of the photo would be considered which section of a soil profile?
A) unconsolidated material
B) subsoil
C) topsoil
D) organic layer
A
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Gierer and Schramm isolated ______ from tobacco mosaic virus and applied it to plant tissue, which caused the same types of lesions that occurred when plants were exposed to intact tobacco mosaic virus
A. RNA B. DNA C. proteins D. capsids
Beadle and Tatum began their studies with wild-type Neurospora, which is:
a. Neurospora that only grows in the wild. b. a mutant strain that will only grow in the lab on complete medium. c. a strain that will not grow in the lab. d. a virulent strain of Neurospora. e. a normal phenotype that will grow on minimal medium.
How might a virus pick up a human oncogene?
a. Specialized transduction b. Transformation c. Reverse transcription d. Biosynthesis e. Viral conversion
In a hybrid zone, ________ can occur if the reproductive barrier between two species is weak, as seen among cichlids in the murky waters of modern Lake Victoria
A) reinforcement B) fusion C) allopatric speciation D) reproductive isolation