Tropical Rainforests Have Many Species That Are Found in Great

question 43

Multiple Choice

Tropical rainforests have many species that are found in great abundance. A study in the Brazilian rainforest found 487 tree species growing on a single hectare (2.5 acres) . In the US and Canada together, there are only 700 species of trees on millions of acres. In one park in a Peruvian rainforest, scientists have identified over 1300 species of butterflies, while in all of Europe there are approximately 320 butterfly species. These findings suggest that

• A) rainforests are biologically less diverse than other ecosystems on earth.
• B) the number of tree species and butterfly species are about the same throughout the ecosystems of the world.
• C) rainforests are biologically more diverse than other ecosystems.
• D) as many as 400 species a day are lost due to human activity.
• E) rainforests do not have any type of value to humans.

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Definitions:

Alternative Hypothesis

A statement that proposes a new theory or relationship, typically suggesting that there is a statistically significant effect or association between variables.

P-value

The likelihood of achieving outcomes as significant as, or more so than what was actually observed in the study, assuming the null hypothesis is true.

Alternative Hypothesis

A hypothesis that contradicts the null hypothesis, proposed when the null hypothesis is expected to be rejected.

Descriptive Terms

Words or phrases used to describe or characterize a particular subject or phenomena without quantifying it.