Question

competition occurs...
○ between one species
○ two or more species
○ all the above
○ none of the above
an ecological niche refers.....
○ an organisms role or job
○ where organism lives
○ a symbiotic relationship

Explanation:

First Question (Competition occurs...):

Competition in ecology can occur within a species (intraspecific competition, between one species) and between different species (interspecific competition, two or more species). So "all the above" is correct as it includes both intraspecific (one species) and interspecific (two or more species) competition.

An ecological niche is the role or "job" an organism has in its ecosystem, including its interactions, resources it uses, etc. "Where an organism lives" is a habitat, and "a symbiotic relationship" is a type of interaction, not a niche. So the correct option is "an organisms role or job".

Answer:

C. all the above (assuming options are labeled A, B, C, D with A: between one species, B: two or more species, C: all the above, D: None of the above)

Second Question (An ecological niche refers...):