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QuestionBiology

Which statement best describes succession? A. Parts of all communities are constantly undergoing succcession. B. Only communities with resistant species can avoid succcession. C. Succession causes a disturbed ecosystem to become less stable. D. An ecosystem's organisms become larger as succession progresses.
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Answer

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Step 1:
I'll solve this ecology problem step by step:

Step 2:
: Understand the concept of ecological succession

Ecological succession is the process of change in the species structure of an ecological community over time. This involves gradual and predictable changes in the composition of species in a given area.

Step 3:
: Analyze each option carefully

Option A: "Parts of all communities are constantly undergoing succession" - This statement is TRUE - Succession is a continuous process that occurs in all ecosystems - Communities are always changing due to environmental factors, species interactions, and disturbances - Both primary and secondary succession are ongoing processes in nature

Step 4:
: Evaluate the remaining options

Option B: "Only communities with resistant species can avoid succession" - This is FALSE - Succession occurs in ALL communities, regardless of species resistance - No ecosystem is completely static or immune to change Option C: "Succession causes a disturbed ecosystem to become less stable" - This is FALSE - Actually, succession typically increases ecosystem stability over time - As succession progresses, biodiversity and ecological complexity increase Option D: "An ecosystem's organisms become larger as succession progresses" - This is FALSE - Succession is about species composition and complexity, not organism size - Organisms become more diverse and interconnected, not necessarily larger

Step 5:
: Identify the correct answer

The statement that best describes succession is Option A.

Final Answer

Parts of all communities are constantly undergoing succession.