OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Volcanic eruptions result in a surface of hardened lava.
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Fire wipes out all organisms in an area.
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A flood occurs.
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A forest is bulldozed by humans.
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Detailed explanation-1: -Primary succession occurs after a volcanic eruption or earthquake; it involves the breakdown of rocks by lichens to create new, nutrient-rich soils. The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment.
Detailed explanation-2: -Primary succession happens when a new patch of land is created or exposed for the first time. This can happen, for example, when lava cools and creates new rocks, or when a glacier retreats and exposes rocks without any soil.
Detailed explanation-3: -When disturbances destroy an existing habitat, secondary succession may occur. This disturbance could be a forest fire or volcanic eruption. The plants and animals are gone, but the soil remains. Secondary succession begins on existing soil.
Detailed explanation-4: -Primary succession refers to the establishment of a community in an uninhabited area such as rocks. Process of primary succession: Primary succession is seen in areas where volcanic eruptions occur. When the lava has cooled and hardened, it forms rocks or barren land.