You are studying a newly discovered prokaryotic microorganism and are attempting to determine whether it will be classified in the domain Bacteria or in the domain Archaea. All of the following would be helpful in making that distinction except
A. Presence or absence of double-stranded circular DNA genome
B. Type of membrane lipids
C. Presence or absence of peptidoglycan in cell walls
D. Sequence of small subunit ribosomal RNA
Answer: A
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Old pine stumps are dug up, split into pieces and sold as "fatwood". Fatwood is used as a fire starter. Why is this done?
A. The wood in the stumps is porous and dry, thus it burns easily. B. The high concentration of volatile organic compounds makes the wood flammable. C. Pine bark does not absorb water and is flammable. Clarify Question What is the key concept addressed by the question? Gather Content What do you already know about pine? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Microphytoplankton is:
a. 2.0 to 20 microns. b. 20 - 200 microns. c. 0.2 - 20 mm. d. 20 - 200 cm. e. 20 - 200 mm.
All mammals have hair, mammary glands, and a placenta.
Answer the following statement true (T) or false (F)
The length of a particular gene in human DNA, measured from the start site for transcription to the end of the protein-coding region, is 10,000 nucleotides, whereas the length of the mRNA produced from this gene is 4000 nucleotides
What is the most likely reason for this difference?