Module 4 Chapter 31 Multiple choice questions 31.2

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. Red squirrels (Sciurus vulgaris) have been in decline in the UK since the introduction of the grey squirrel (Sciurus carolinensis). Which of the following statements is most consistent with the researchers' explanations for this decline?

The incidence of SQPV in red squirrel population has coincided with the arrival of grey squirrels. correct incorrect

Both squirrel species utilize similar resources, including food (tree seeds) and habitats. correct incorrect

The two squirrel species are reproductively incompatible. correct incorrect

The two squirrel species can coexist in the same location. correct incorrect

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. Following the eruption of Mount St Helens in Washington, USA, more than 23,000 ha of forest was destroyed. Scientists studied the rate at which vegetation re-colonized the destroyed areas, and concluded that plant species richness for the years 1987–1991 were, respectively 31, 33, 35, 38, 42. During which period was there the greatest increase in species number?

1987–1988 correct incorrect

1988–1989 correct incorrect

1989–1990 correct incorrect

1990–1991 correct incorrect

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