Lichens are symbiotic relationships established
between
a. a club fungus and a green alga.
b. a club fungus and a cyanobacterium.
c. sac fungi and green algae.
d. sac fungi and cyanobacteria.
e. any of these.
Answer: e
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A. glucose B. glycerol C. nucleotide D. fatty acid E. cellulose
Select the correct sequence of animal developmental
events. a. fertilization >>> cleavage >>> gastrula >>> blastula b. fertilization >>> cleavage >>> blastula >>> gastrula c. fertilization >>> blastula >>> cleavage >>> gastrula d. fertilization >>> gastrula >>> blastula >>> cleavage e. fertilization >>> blastula >>> gastrula >>> cleavage
Successful insertion of a DNA fragment into the polylinker region of pBluescript II is detected by
A) production of the enzyme ?-galactosidase. B) absence of the enzyme ?-galactosidase. C) the increased size of the plasmid. D) autoradiography. E) None of these
Atoms with eight electrons in their outer shells tend to:
A) form covalent bonds. B) be stable and unreactive. C) be chemically reactive. D) form ionic bonds.