Which protist is a concern because of its ability to contaminate water supplies and cause diarrheal illness?
A) Plasmodium vivax
B) Toxoplasma gondii
C) Giardia lamblia
D) Trichomonas vaginalis
Ans: C) Giardia lamblia
You might also like to view...
The cytoskeleton has several primary functions. The first and most obvious is that it acts as an interior skeleton that supports the rest of the cell. What is another function of the cytoskeleton?
A. It connects one cell to another. B. It creates a durable outer covering to increase the strength and rigidity of the cell. C. It provides a communication network whereby chemo-electrical signals can be sent from one area of the cell to another. D. It provides a series of tracks along which vesicles can move throughout the cell.
Which of the following structures is common to plant and animal cells?
a. chloroplast b. wall made of cellulose c. tonoplast. d. mitochondrion e. centriole
Chargaff's rules for the pairing of nitrogen bases is
A. A+T = G+C. B. A = C and G = T. C. A = T and G = C. D. A = G and C = T.
Which group of microbes prefers using oxygen but can survive without it?
A) aerotolerant anaerobe B) obligate aerobe C) facultative anaerobe D) obligate anaerobe E) microaerophile