Which of the following factors does NOT contribute significantly to the process of speciation?
Geographic isolation
Reproductive isolation
Genetic drift
Random mating within a population
Related Questions
Which of the following is NOT a characteristic of species found in a stable community?
Relatively narrow niche
Stable population size
Strong interspecific interactions
Rapidly increasing population size
Which of the following is an example of a keystone species?
A common grass species in a grassland
A rare butterfly species in a rainforest
Sea otters controlling sea urchin populations and maintaining kelp forests
A bacterial species decomposing leaf litter
The process by which a community changes over time is known as:
Adaptation
Evolution
Succession
Mutation
Which interaction is LEAST likely to contribute to community stability?
Mutualism
Predation
Commensalism
Intense competition
Autotrophic microbes which can fix atmospheric nitrogen are all. except
Anabaena
Nostoc
Oscillatoria
Spirulina
What is the relationship between species richness and community stability?
Always positive, more species always means more stability
Generally positive, greater richness often leads to greater stability
No relationship, richness and stability are independent
Generally negative, more species leads to more competition and instability
A community with high species diversity is likely to have:
Simple food chains
Low resilience to disturbances
Complex food webs
Few trophic levels
