Which would be an example of primary succession?Question 8Select one:a.The regrowth of a forest after a fire.b.The first growth on land uncovered when a glacier retreats.c.The growth of wild plants on an abandoned farm.d.all of the above.
Question
Which would be an example of primary succession?Question 8Select one:a.The regrowth of a forest after a fire.b.The first growth on land uncovered when a glacier retreats.c.The growth of wild plants on an abandoned farm.d.all of the above.
Solution
The correct answer is b. The first growth on land uncovered when a glacier retreats.
Primary succession refers to the sequence of communities forming in an originally lifeless habitat. In this case, when a glacier retreats, it leaves behind bare rock, which is a lifeless habitat. The first organisms to colonize such a habitat (usually lichens and mosses) start the process of primary succession.
Option a refers to secondary succession, which occurs in areas where a community that previously existed has been removed; it is typified by higher rates of growth. Secondary succession happens after events like forest fires, hurricanes, or human activities like farming.
Option c is also an example of secondary succession because the land was previously occupied by a different community (the farm crops).
Option d cannot be correct because not all of the above are examples of primary succession.
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