The Janzen-Connell Hypothesis

question 67

Multiple Choice

The Janzen-Connell hypothesis:

• A)proposes that interactions with host-specific pathogens, herbivores, or seed predators play a role in decreasing plant diversity.
• B)is based on the observation that seeds often suffer lower rates of herbivory when growing directly beneath a parent tree.
• C)is supported by research that demonstrated that seeds of rare species are more likely to escape seed predators.
• D)is supported by data that indicated that seed and seedling mortality was not density dependent, thus favoring more common species.
• E)indicates that rare plants do not survive well in the tropics.

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Definitions:

Emergent

Arising suddenly and unexpectedly.

Beneficial

Producing good results or having a positive effect on someone or something.

Chief Complaint

(1) A brief description of the reason for the patient’s visit; (2) the main reason for seeking medical care.

Diagnosing

The process of identifying a disease or condition from its signs and symptoms by systematic analysis.