The Symbols +, -, and O Are to Be Used

question 19

Multiple Choice

The symbols +, -, and o are to be used to show the results of interactions between individuals and groups of individuals in the examples that follow. The symbol + denotes a positive interaction, - denotes a negative interaction, and o denotes where individuals are not affected by interacting. The first symbol refers to the first organism mentioned.
-What interactions exist between mycorrhizae and evergreen tree roots?

• A) +/+
• B) +/o
• C) +/-
• D) o/o
• E) -/-

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Definitions:

Ice-Core Data

Information obtained from cylindrical sections of ice drilled from glaciers and ice sheets, which provide valuable records of past climates.

Atmospheric Warming

The rise in Earth's average temperature due to increases in greenhouse gases, leading to climate change and variability in weather patterns.

Caliche

A sedimentary rock, a hardened natural cement of calcium carbonate that binds other materials—such as gravel, sand, clay, and silt.

Desert Pavement

A natural surface covering of closely packed rock fragments found in desert regions, formed by the removal of finer particles by wind and water.