Trees often produce secondary chemicals to deter herbivores from feeding on thei

Question

Trees often produce secondary chemicals to deter herbivores from feeding on their leaves; in turn, many herbivores have produced ways of avoiding or detoxifying these chemicals. This is an example of 1) competitive exclusion 2) predatory avoidance 3) coevolution 4) parasitic evolution 5) parasite predation The species redundancy hypothesis suggests: 1) all species are important for the proper functioning of a community 2) species are not important 3) that loss of some species does not affect the function of a community 4) disturbances produce the largest number of species 5) time is an important factor influencing species number Which one of the following cycles is characterized by often being a limiting nutrient in ecosystems and having no atmospheric component in its cycle? 1) phosphorus 2) carbon 3) nitrogen 4) iron 5) water.

Explanation / Answer

1. Answer is option 3(co-evolution). Coevolution is defined as the influence of two closely related species on each other's evolution.

2. Answer is option 3. The species redundency hypothesis implies that one or more species may impart a role in the development of dynamic stability during the loss of some species due to harsh conditions.

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