The ____ is an extension of the upper body wall in mollusks
a. Radula
b. Mantle
c. gill
d. lung
e. siphon
ANSWER: b
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What phenomenon accounts for the appearance of chloroplasts in some unicellular phototrophic eukaryotes?
A) endosymbiosis B) secondary endosymbiosis C) sequencing of chloroplasts' SSU genes D) horizontal gene transfer
Which of the following would have glycosidic bonds?
A. Monosaccharides B. Polysaccharides C. ATP D. Polypeptides E. Triglycerides
Whole-cell movements involve the coordinated activity of
a. microtubules. b. microfilaments. c. blastomeres. d. microtubules and microfilaments. e. microtubules and microfilaments and blastomeres.
Select the response that describes a broad-spectrum drug.
A. A drug that is effective against E. coli (Gram-negative) and Staphylococcus aureus (Gram-positive) B. A drug that is effective against Staphylococcus and Streptococcus (Gram-positive) but not Klebsiella (Gram-negative) C. A drug that is effective against Gram-negative organisms D. A drug that is effective against Gram-positive organisms