What fraction of all of the organic carbon on Earth results from microbial fixation of carbon dioxide in the oceans?
A. About 1/4
B. About 1/2
C. About 3/4
D. About 1/8
Answer: B
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A high concentration of chlorophyll imbedded in the plasma membrane fold of a newly discovered species of bacteria suggests a:
A. Chemolithoautotrophic metabolism B. Chemoheterotrophic metabolism C. Photoautotrophic metabolism D. Photoheterotrophic metabolism Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about bacterial metabolism? How does it relate to the question? · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Sketch an exponential growth curve with correctly labeled axes. Identify two organisms and the conditions under
which they might demonstrate such growth. What will be an ideal response?
Which of the following may occupy more than 90% of a mature plant cell's volume?
a. chromoplasts b. the rough endoplasmic reticulum c. the central vacuole d. the nucleus
________ use electrons from reduced inorganic or organic compounds as a source of energy and CO2 as a source of carbon.
a) Photoautotrophs b) Photoheterotrophs c) Chemoautotrophs d) Chemoheterotrophs