Ecologists Often Build Models to Depict the Relationships Between Organisms

question 71

Multiple Choice

Ecologists often build models to depict the relationships between organisms. In such models, an arrow is used to link two organisms in a relationship. The arrowhead is next to the organism that is affected. If the effect is positive, the arrow is labeled with (+) , and if negative, then the label is (-) . Which of the following models best illustrates the relationship of the Brazil nut tree and the other organisms associated with it?

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Definitions:

Desert Environment

A biome characterized by very little rainfall, extreme temperatures, and sparse vegetation, making it a challenging habitat for life.

Photosynthetic Mode

A method by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose.

CAM

A type of photosynthesis (Crassulacean Acid Metabolism) adapted by some plants to minimize water loss in arid conditions by fixing CO2 at night.

CAM Plants

Plants that utilize Crassulacean Acid Metabolism, a carbon fixation pathway that allows them to conserve water in arid conditions by opening their stomata at night.