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2.Fundamental niche is the entire set of conditions under which an animal (population, species) can survive and reproduce itself. Realized niche is the set of conditions actually used by given animal (pop, species), after interactions with other species (predation and especially competition) have been taken into account.

3.As a population approaches its carrying capacity, the growth rate slows because of limiting resources. Logistic Growth is density-dependent which means that the growth rate depends on the population density. ... When a population exceeds the carrying capacity of the environment and deaths result from a lack of resources.

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enhanced global partnerships and exploration capabilities may advance international preparedness for protecting the earth from catastrophic events such as some asteroid strikes, advancing collaborative research on space weather and protecting spacecraft by developing new means for space debris removal.