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Chapter 54: Q54-8TYU (page 1235)

The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

(A) tropical communities are younger.

(B) tropical regions generally have more available water and higher levels of solar radiation.

(C) higher temperatures cause more rapid speciation.

(D) diversity increases as evapotranspiration decrease.

Short Answer

Expert verified

  1. The statement 鈥渢ropical communities are younger鈥� isfalse.

  2. The statement 鈥渢ropical regions generally have more available water and higher levels of solar radiation鈥� istrue.

  3. The statement 鈥渉igher temperatures cause more rapid speciation鈥� is false.

  4. The statement 鈥渄iversity increases as evapotranspiration decreases鈥� is false.

Step by step solution

01

Ecogeography

The discipline of biology that focuses on dealing with species distribution and associated environment across the globe is called Ecogeography.

02

Explanation of option ‘(A)’

The region of the earth with a hot and humid climate, high amount of rainfall, and higher temperature due to the area near the equator is called the tropical region.

Thus, the tropical communities are not younger due to constant changes in the earth.

Therefore, the given statement is false.

03

Explanation of option ‘(B)’

The several features of tropical regions are being located around the equator, adequate rainfall, heavy rainfall, and humid conditions.

Thus, photosynthetic plants can grow in the tropical region due to the availability of ample amount of water and solar radiation.

Therefore, the given statement is true.

04

Explanation of option ‘(C)’

The evolutionary process of creating new kinds of living organisms in nature due to the termination of gene flow of the existing population is called speciation.

Thus, the evolution results in rapid speciation.

Therefore, the given statement is false.

05

Explanation of option ‘(D)’

The combination of two naturally-occurring atmospheric processes, such as evaporation and transpiration in plants, is called evapotranspiration.

Thus, evapotranspiration influences biodiversity.

Therefore, the given statement is false.

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Most popular questions from this chapter

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