The substance that strengthens and supports cell walls, allowing plant to grow tall and upright is
A. sporophyte.
B. gametophyte.
C. chlorophyll.
D. stomata.
E. lignin.
Answer: E. lignin.
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Your cousin learns that she is a carrier for phenylketonuria (PKU). Her husband's biological mother has PKU. She
asks you to explain what this could mean if she and her husband have children and asks what, if anything, could be done to best protect any child that may have. What would you tell her?
What will be an ideal response?The toxin of Vibrio cholerae causes severe diarrhea because it ____
a. modifies DAG and activates a cascade of protein kinases b. activates phospholipase to produce inositol triphosphate c. decreases the cytosolic concentration of Ca++ d. modifies a G protein involved in regulating salt and water secretion e. binds with adenylyl cyclase and triggers formation of cAMP
Which protist group includes members with plantlike traits such as chloroplasts and multicellularity?
A) Slime molds B) Algae C) Amoebas D) None of the protists have chloroplasts.
A gastroenteritis which usually resolves in 72 hours is contracted from eating shellfish contaminated with
A) Campylobacter jejuni. B) Ehrlichia caffeensis. C) Helicobacter pylori. D) Vibrio cholera. E) Vibrio parahaemolyticus.