Biodiversity hot spots, those areas with the greatest number of endemic species. Which of the following criteria to qualify as a hot spot region?

A. It must contain at least 1,500 species of vascular plants as endemics

B. It must have lost at least 70% of its original habitat

C. It must contain at least 500 species of bird species

D- It must contain high numbers of species

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#Question id: 11183

#Section 1: Ecology

Which of the following is an example of a density-independent mechanism?

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#Question id: 16875

#Section 3: Mathematics and Quantitative Ecology

In a random sample of 1000 students, pˆ = 0.80 (or 80%) were in favor of longer hours at the school library. The standard error of pˆ (the sample proportion) is

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#Question id: 12677

#Section 5: Applied Ecology & Evolution

Aquatic ecosystems that are most readily damaged by acid are those that lack an important buffer that dissolves into the runoff after a precipitation event. What is this buffer?

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#Question id: 11361

#Section 4: Behavioural Ecology

Which of the following tends to stabilize predator-prey relationships?

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#Question id: 10848

#Section 1: Ecology

Intraspecific competition

A. Is seen only in species of animals

1. Through time, hosts become more resistant to parasitic infections and, if they are to be successful, parasites become less likely to cause the death of their hosts. This is an example of