Soybeans Will Have Several Hundred Rhizobium Nodules

question 53

Multiple Choice

Soybeans will have several hundred Rhizobium nodules.A study in Minnesota found that soybeans grown without P₂O₅ fertilizer produced 23.0 bushels per acre,while adding 23 lbs of P₂O₅ per acre gave a yield of 37 bushels per acre.What is the best explanation for this observation?

• A) Rhizobium produces PO₄ and NH₄, so you do not need any fertilizer.
• B) Rhizobium produces PO₄, so you do not need phosphorus-containing fertilizer.
• C) Rhizobium cannot produce PO₄, so you need to add phosphorus-containing fertilizer.
• D) Rhizobium cannot produce NH₄, so you need to add nitrogen-containing fertilizer.
• E) Rhizobium produces NH₄, so you do not need nitrogen-containing fertilizer.

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Definitions:

Deindividuation

A psychological state where an individual loses self-awareness and a sense of individuality, often leading to disinhibited behavior, usually in group settings.

Deindividuation

A psychological state where an individual loses self-awareness and self-restraint, often occurring in group settings that foster anonymity.

Social Facilitation

When the mere presence of others improves performance.

Group Polarization

The phenomenon by which a group's prevailing attitudes or beliefs become more extreme following group discussions, as members tend to support more extreme positions.