Use the Following Information to Answer the Question(s) Below

question 47

Multiple Choice

Use the following information to answer the question(s) below.
Canadian and Swiss researchers wanted to know if the diversity of arbuscular mycorrhizal fungi (AMF) was important to the productivity of grasslands (M.G.A. van der Heijden, J. N. Klironomos, M. Ursic, P. Moutoglis, R. Streitwolf-Engel, T. Boler, A. Wiemken, and I. R. Sanders. 1998. Mycorrhizal fungal diversity determines plant biodiversity, ecosystem variability and productivity. Nature 396:69-72) . Specifically, they wanted to know if it mattered which specific AMF species were present, or just that some type of AMF was present. They grew various plants in combination with one of four AMF species (A, B, C, and D) , no AMF species (O) , or all four AMF species together (A + B + C + D) ; and they measured plant growth under each set of conditions. All plant species were grown in each plot, so they always competed with each other with the only difference being which AMF species were present.
On the graphs below, the x-axis labels indicate the number and identity of AMF species (bar 0 = no fungi; bars A-D = individual AMF species; bar A + B + C + D = all AMF species together) . The y-axis indicates the amount (grams) of plant biomass for the species shown in italics above each graph. Graph (e) is the total biomass (grams) of all 11 plant species combined; graph (f) is the biomass of Bromus erectus plants only, separated from the total.
-Based on graphs in the accompanying figure, which of the following is the best description of the data supporting the idea that a plant species did not form mycorrhizae with a fungus? Its biomass is greatest when ________.

• A) no AMF are present
• B) AMF fungus A is present
• C) AMF fungus B is present
• D) AMF fungus C is present
• E) all AMF are present

Explain the psychological and neurobiological theories behind dreams.

Recognize the impact of sleep deprivation on emotional, cognitive, and physical health.

Appreciate the changes in sleep patterns and requirements across the lifespan.

Identify and describe various sleep disorders and their conventional interventions.

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Definitions:

Finishing Department

A section within a manufacturing operation where products undergo final processing, treatments, or coatings before being ready for sale.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead costs to products or job orders, based on a selected activity base, before the actual costs are known.

Machine-Hours

A measure of the amount of time a machine is operated, often used in costing and budgeting processes.

Forming Department

A production department specialized in shaping and assembling parts or materials into finished goods.