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In general , species diversity ...........

In general , species diversity ...............as we move away from the equator towards the poles and with very few exceptions, tropics harbor ............... species than temperate or polar areas.
(1) a -increases , b-less
(2) a -decreases , b-more
(3) a -increases , b-more
(4) a -decreases, b- less

A

a -increases , b-less

B

a -decreases , b-more

C

a -increases , b-more

D

a -decreases, b- less

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the statements regarding species diversity in relation to latitude, specifically as we move from the equator towards the poles. ### Step-by-Step Solution: 1. **Understanding Species Diversity**: - Species diversity refers to the variety of different species present in a particular region. It is influenced by various factors including climate, temperature, and ecological dynamics. 2. **Species Diversity at the Equator**: - The equator is known for its warm climate and high levels of biodiversity. Tropical regions near the equator typically have a higher number of species due to favorable conditions for growth and reproduction. 3. **Species Diversity Towards the Poles**: - As we move away from the equator towards the poles, the climate becomes cooler and more extreme. This leads to a decrease in the variety of species that can survive in these harsher conditions. Therefore, species diversity decreases as we move towards the poles. 4. **Comparing Tropics with Temperate and Polar Regions**: - The tropics, being closer to the equator, harbor more species compared to temperate (mid-latitude) and polar regions (high-latitude). This is due to the warmer temperatures and more stable ecological conditions that support a wider range of organisms. 5. **Choosing the Correct Options**: - From the analysis, we conclude that: - Species diversity **decreases** as we move away from the equator towards the poles. - Tropics harbor **more** species than temperate or polar areas. - Therefore, the correct option is (2) a -decreases, b-more. ### Final Answer: (2) a -decreases, b-more
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