Glucose fermentation by Clostridium spp. produce ATP only when acetate and butyrate are produced. Why do these organisms produce acetone and butanol after strong initial activity of generating ATP with acetate and butyrate byproducts?
A) Acetate and butyrate accumulation creates a deadly acidic environment, which acetone and butanol do not.
B) Acetate and butyrate are no longer needed for biosynthetic pathways.
C) Acetone and butanol serve as better sources for NAD(P)+ reduction.
D) Acetone and butanol production is favored for stability to store intracellular carbon sources for potential nutrient poor conditions.
Answer: A
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Dandelions develop seeds by apomixis. What benefits does this strategy provide over vegetative or sexual reproduction?
A. Apomixis makes the dandelions more resistant to herbicides. B. Apomixis provides the benefits of seed dispersal, while maintaining a genome adapted to a given climate. C. Apomixis is beneficial in sheltered areas where wind pollination would be difficult. D. Apomixis is beneficial for plants that attract a diverse mix of bees and other pollinators. 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 apomixis? 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?
With ____ selection, the frequency of the mean phenotype decreases while the frequencies of extreme phenotypes
increase.
a. directional b. stabilizing c. disruptive d. sexual e. dominant
Which of the following factors is the most important requirement in order for life to emerge?
a. the presence of liquid water b. the presence of air c. the presence of soil d. the presence of sunlight
Which type of anatomical feature is a plant stem considered to be?
a. an organ b. a meristem c. a shoot system d. a tissue