BIO 320 Exam 1 Questions and Answers
Biodiversity is built from what 3 features? - ANSWER-Ecosystem diversity, species diversity, genetic
diversity
Species that lack genetic diversity are? - ANSWER-More vulnerable to fluctuations due to climate
change, disease, and habitat fragmentation.
True ...
Estimated number of species in a community... - ANSWER✔✔-Increases with an increase in the number
of species represented by a single individual and decreases with an increase in the number of species
represented by 2 individuals
Relative Abundance - ANSWER✔✔-The proportion of individuals in a community represented by each
species
True or false; most species have a hight or low abundance? - ANSWER✔✔-False. Most species have
intermediate abundance
Frank Preston - ANSWER✔✔-Developed a way to visualize patterns of variation in abundance of different
species.
Log-normal Distribution - ANSWER✔✔-A bell-shaped curve that uses a logarithmic scale of the x-axis
True or false; log-normal distributions of species can be found across a wide variety of communities and
taxonomic groups - ANSWER✔✔-True
Rank-abundance curves - ANSWER✔✔-Plot the relative abundance of each species in a community in
rank order from most abundant to least abundant
Rank-abundance curves are useful in? - ANSWER✔✔-Illustrating how communities differ in species
richness and species evenness
Species Evenness - ANSWER✔✔-Comparison of the relative abundance of each species in a community
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