The human microbiome is best described as:
A. bacteria associated with the body.
B. bacteria and fungi associated with the body.
C. bacteria, fungi, and archaea associated with the body.
D. viruses that have integrated their genomes into the human genome.
E. bacteria, fungi, and archaea that have integrated their genomes into the human genome.
C
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Which of the following reflects a primary difference between transmission and scanning electron microscopy?
A. Transmission electron microscopy has high resolution, but scanning electron microscopy does not. B. Transmission electron microscopy shows contrast, but scanning electron microscopy does not. C. Transmission electron microscopy has much higher magnification than scanning electron microscopy. D. Transmission electron microscopy shows two-dimensional ultrastructure, while the scanning electron microscopy shows three-dimensional structure. E. Transmission electron microscopy uses light as an illumination source, while scanning electron microscopy uses electron beams as an illumination source.
Several distribution patterns are seen in natural populations; the most common is ________
a. clumped b. uniform c. random d. none of the choices
The hierarchical nature of cellular structure is accurately illustrated in which of the following lists of substances (from smallest to largest)?
A) nucleotides, chromosome, DNA, nucleus, cell B) cellulose, glucose, cell wall, cell C) nucleotides, nucleus, DNA, chromosome, cell D) nucleotides, DNA, chromosome, nucleus, cell E) protein, membrane, amino acids, chloroplast, cell
Lately, many claims concerning the health benefits of green tea have appeared in the news. Suppose you read a claim that says drinking green tea causes weight loss
The information provided states that participants were weighed at the beginning of the study, were then asked to drink 2 cups of green tea every day for 6 weeks, and finally were weighed at the end of the study. Participants who drank the tea for 6 weeks seemed to have lost some weight by the end of the study, so the researchers concluded that green tea is helpful for weight loss. This study has some obvious holes in it. Explain three things that could be done to improve the design of this study. Do not assume any information other that what has been provided.