A researcher is using adult stem cells and comparing them to other adult cells from the same tissue. Which of the following is a likely finding?
A) The cells from the two sources exhibit different patterns of DNA methylation.
B) Adult stem cells have more DNA nucleotides than their counterparts.
C) The two kinds of cells have virtually identical gene expression patterns in microarrays.
D) The nonstem cells have fewer repressed genes.
A
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Is Nakano's quote from Science consistent with the textbook's claim that RNA is a good candidate for the first life form?
A) yes B) no
Some species of bean bug, which are common pests on soybean plants, can acquire resistance
to a common herbicide by nurturing protective bacteria in their gut. The bacteria grow well in the gut, do not cause any harm, and receive all their nutrients from the bean bug. This is an example of __________.
a. commensalism b. mutualism c. predation d. parasitism
Explain how short-term memory is consolidated into long-term storage. What will be an ideal response?
Micronutrients
A) benefit organisms if they are present but are not essential.
B) are not naturally occurring and must be synthesized by scientists.
C) are needed in smaller quantities than are macronutrients.
D) include water, carbon, nitrogen, and phosphorus.
E) are smaller molecules than are macronutrients.