Which substance is defective in Marfan syndrome?
a. sphingolipids
b. albumin
c. fibrillin
d. amyloid
e. LDLs
C
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Which of the following explains the function of a cuticle on land plants?
a. providing a waterproof cover to leaves and stems b. facilitating the intake of carbon dioxide for photosynthesis c. regulating the flow of gases and water vapor d. deterring animals with poisonous secondary metabolites
The urinary bladder, identified as ____ in the accompanying diagram, is separated from the ____ by a sphincter
a. A; ureter b. C; ureter c. A; urethra d. C; urethra e. A; urethra
A frequent cancer that is seen in AIDS patients is ________.
A. myeloma B. leukemia C. Hodgkin's lymphoma D. Kaposi's sarcoma E. melanoma
Although all of the cells in your body contain a complete set of DNA, different types of cells arise because__________.
a) different genes are switched on and off in each type of cell b) the contain different chromosomes c) they contain different genes d) none of the above