A. Stratification
B. Dominance
C. Physiognomy
D. Diversity
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The keystone species are those which exhibit:
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The mycorrhizae present in association with higher plant roots are best described as:
A. Low abundance, little influence
B. High abundance, little influence
C. Low abundance, high influence
D. High abundance, high influence
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The number of individuals of a species per sampling unit is called its:
A. Keystone species
B. Edge species
C. Critical link species
D. Edaphic pod species
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The number of sampling units expressed in percentage in which a particular species occurs is called its:
A. Biomass
B. Abundance
C. Density
D. Frequency
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The earliest settlers on barren lands generally are:
A. Abundance
B. Density
C. Frequency
D. Phenology
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When the vegetation of any region reaches climatic climax, it is:
A. Diatoms
B. Ferns
C. Mosses
D. Lichens
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The herb stage in a lithosphere is immediately followed by plants like:
A. Lithophytic
B. Xerophytic
C. Mesophytic
D. Hydrophytic
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The last community in a succession is called:
A. Potantilla
B. Zizyphus
C. Umbilicaria
D. Grimmia
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Many forested regions of today were once barren rock areas. Mot likely this change involved the following sequence of stages:
A. Ecosystem
B. Climatic community
C. Ecotons
D. Seral community
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