Several new tetraploid species of a plant called salsify (Tragopogon) known as salsify have arisen in western North America. These new species each arose from a diploid species that went through the process of allopolyploidy. This mode of speciation is a type of ________ and it occurs _______.
A. allopatric speciation; almost instantaneously
B. allopatric speciation; very slowly
C. sympatric speciation; almost instantaneously
D. sympatric speciation; very slowly
E. adaptive radiation; very slowly
C. sympatric speciation; almost instantaneously
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If the sequence of a cDNA has matches with DNA sequences in the genome, then this genomic DNA is likely to _____
A) code for a protein B) code for an rRNA C) be part of an intron D) be a regulatory sequence
All of the following are examples of basic dyes except
A. nigrosin. B. crystal violet. C. safranin. D. methylene blue. E. carbol fuchsin.
Which of the following is NOT a way bryophytes imbibe water?
1) Capillary action 2) xylem 3) Diffusion 4) Both A and C
Organisms that live in an aquatic environment get their carbon from calcium carbonate shells on the bottom, instead of from carbon dioxide in the environment.
Answer the following statement true (T) or false (F)