Biology Organisms & Population part 25 (Competition, Commensalism) class 12 XII | Summary and Q&A

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February 29, 2016
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Biology Organisms & Population part 25 (Competition, Commensalism) class 12 XII

TL;DR

Different types of interactions between organisms in a population, including competition, competitive exclusion, resource partitioning, and commensalism.

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Questions & Answers

Q: What is competition in the context of organisms and population interactions?

Competition is a process in which two or more species fight for limited resources, resulting in the dominance of one species and the deprivation of resources for the other.

Q: What is the competitive exclusion principle?

The competitive exclusion principle states that two closely related species competing for the same resources cannot coexist indefinitely, as the competitively inferior one will be eventually eliminated.

Q: How do closely related species coexist despite competing for the same resources?

Resource partitioning allows closely related species to coexist by utilizing resources in different ways or at different times, reducing direct competition.

Q: What is commensalism in population interactions?

Commensalism is a relationship in which one organism benefits while the other is neither benefited nor harmed. It is exemplified by the clownfish benefiting from the protection provided by the sea anemone.

Summary & Key Takeaways

  • Competition occurs when two species fight for limited resources, with one species usually dominating and the other losing out.

  • Competitive exclusion principle states that closely related species competing for the same resources cannot coexist indefinitely, as the competitively inferior one will eventually be eliminated.

  • Resource partitioning allows closely related species to coexist by utilizing resources in different ways or at different times.

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