An agent that reproduces in cells but is NOT composed of cells and contains RNA as its genetic material is a(n)
a. Alga.
b. Bacterium.
c. Fungus.
d. Helminth.
e. Virus.
Ans: e. Virus.
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Florists often create brightly colored flowers by immersing the stems in colored water. Which
cells are primarily responsible for this color change?
a. phloem b. xylem c. xylem and phloem d. neither xylem nor phloem
________ causes 15 - 20% of all human deaths in developed countries
a. Heart disease b. Strokes c. Cancer d. Car accidents e. Diabetes
The bacteria that cause tooth decay have a capsule. What does this tell you about the relative effectiveness of a toothbrush with stiff bristles and one with soft bristles?
What will be an ideal response?
While members of Tubulinea are normally found in marine or freshwater environments, they can also be found in ventilation ducts where they feed on bacterial biofilms.
Answer the following statement true (T) or false (F)