Which statement best describes ecological succession? it is always caused by human intervention. it sometimes occurs after a disturbance. it always occurs in a predictable pattern. it is a series of rapid changes in an ecosystem.

The correct answer is it always occurs in a predictable pattern.

Ecological successsion is defined as a change in the structure of species of an ecological community over a period of time. The succession that begins in a new environment by uninfluence of pre-existing species is called primary succession. The disruption of pre-existing community because of succession is called secondary succession. Ecological succession happens in a predictable pattern. The ecological communities undergoes predictable change which creates a disturbance or initial formation of new habitat. This changes occurs in an orderly manner and can be best explained by the example of trees how they grow bigger and bigger.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

the correct answer in apex is tissue development, i know because i just had this question