Topic 4.1 Species, Communities and Ecosystems Understandings Knowledge

Rate your knowledge or skill level for each of these assessment statements or sub-topics for Topic 5.2. A 5 indicates mastery of the topic with respect to IB level questioning.
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  1. Species are groups of organisms that can potentially interbreed to produce fertile offspring.
    1 2 3 4 5


  1. Members of a species may be reproductively isolated in separate populations.
    1 2 3 4 5


  1. Species have either an autotrophic or heterotrophic method of nutrition (a few species have both methods).
    1 2 3 4 5


  1. Consumers are heterotrophs that fed on living organisms by ingestion.
    1 2 3 4 5


  1. Detritivores are heterotrophs that obtain organic nutrients from detritus by internal digestion.
    1 2 3 4 5


  1. Saprotrophs are heterotrophs that obtain organic nutrients from dead organisms by external digestion.
    1 2 3 4 5


  1. A community is formed by populations of different species living together and interacting with each other.
    1 2 3 4 5


  1. Autotrophs obtain inorganic nutrients from the abiotic environment.
    1 2 3 4 5


  1. The supply of inorganic nutrients is maintained by nutrient cycling.
    1 2 3 4 5


  1. Ecosystems have the potential to be sustainable over long periods of time.
    1 2 3 4 5





Linda Kilch