4. Why are the time periods of the Paleozoic and Mesozoic subdivided into early, middle, and late instead of named epochs, as they are in the Cenozoic? O The rocks of these time periods are too young to provide sufficient data to subdivide the periods based on the ages of rocks.
O The fossil record for the Paleozoic and Mesozoic eras is not sufficient to subdivide the periods based on the presence of organisms.
O The number of fossils discovered outnumbers the quantity needed to subdivide the periods based on the presence of organisms.
O The terms early, middle, and late are easier to remember, which removes some confusion for those studying the geologic time scale. We

correct answer: biotic and abiotic limitations

carrying capacity is defined as the total number of an organism who can be supported in a given area within the natural resources limit and without harming or degrading the natural, economic or the cultural environment present for the future generations.

carrying capacity is determined by the limiting factors, which are known to affect the natural resources available. it may include water, nutrients, minerals, space, light etc.

explanation:

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correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.