Saliva contains the hydrolytic enzyme, salivary amylase, which initiates the breakdown of the polysaccharide ________ into the disaccharide, maltose.
A. starch
B. glucose
C. cellulose
D. fructose
E. sucrose
Answer: A
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Researchers use HeLa cells to
a. study cancer. b. study viral growth. c. perform protein synthesis. d. study the effects of radiation. e. do all of these.
Exposure to which of the following chemicals is correlated with low birth weight and premature birth?
A) the plasticizer di(2-ethylhexyl)phthalate (DEHP) B) bisphenol A (BPA) C) the synthetic estrogen diethylstilbestrol (DES) D) polychlorinated biphenols (PCBs)
The defensive mechanisms that target specific pathogens are called ____________ defenses. These responses involve the white blood cells called ____________ .
Fill in the blank(s) with the appropriate word(s).
What is the best explanation for the origin of the unique species recently found in the Annamite Mountains of Vietnam?
A) Temporal isolation B) Allopatric speciation C) Adaptive radiation D) Behavioral isolation E) Sympatric speciation