All of the microbes in the human body are collectively called the:
A) viruses
B) human genome
C) microbiome
D) biofilm
E) none of the above
Ans: C) microbiome
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Certain plants that grow in environments where their roots are often under water need to provide ways of getting which of the following to the roots?
A. carbon dioxide. B. carbon monoxide. C. hydrogen. D. nitrogen. E. oxygen.
A duplicated chromosome has _____ chromatid(s)
a. one b. two c. three d. four
The vegetative parts of plants are the
A. flowers and fruits only. B. stems, roots, flowers, leaves, and fruits. C. roots, stems, and leaves. D. roots, flowers, and stems. E. fruits, flowers, and leaves.
The oldest fossils of eukaryotic cells are about ________ years old.
A. 1.8 billion B. 3.5 billion C. 500 million D. 100 million