Which of the following is an example of the changes that take place in an ecosystem during secondary succession? (2 points) shrubs and trees regrow quickly in an area that has been burned during a forest fire. organisms compete for resources, and those that are best fit to survive establish themselves as dominant species. algae, grasses, and small plants grow on newly exposed rock over a long period of time. predation causes a population of prey to migrate to a new location in order to survive.

Shrubs and trees regrow quickly in an area that has been burned during a forest fire.

An ecological succession can be defined as the changes in the biotic community of the ecosystem with respect to the changes that occur in abiotic (non-living factors) such as climatic conditions, temperature, sunlight, water, soil, natural and man-made calamity. These changes occur with respect to time, until the ecosystem attains stability. Secondary succession occurs in an ecosystem or an area, which was previously colonized by living species but disturbed or damaged by natural or man-made calamity like forest fires, flood, clear cutting and other disaster event.

The secondary succession will resume the colonization of species in a previously disturbed ecosystem, as it will take an aid of useful abiotic factors already available to support life. Shrubs and trees regrow quickly in an area that has been burned during forest fire is an example of secondary succession because the soil of the region will be fertile enough to support growth of new plants. Other factors such as water and sunlight will also support the growth and succession.

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explanation:

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.