What are two key factors that influence species richness in equatorial-polar gradients?

• A. Sunlight and humidity
• B. Soil type and altitude
• C. Temperature and precipitation
• D. Wind patterns and ocean currents

Answer: (C)

Verified step by step guidance

1. Understand the concept of species richness, which refers to the number of different species represented in an ecological community, landscape, or region.
2. Recognize that equatorial-polar gradients refer to the changes in environmental conditions and biodiversity from the equator to the poles.
3. Identify that temperature and precipitation are two key abiotic factors that significantly influence species richness along these gradients.
4. Consider how temperature affects metabolic rates, growth, and reproduction of organisms, leading to higher species richness in warmer equatorial regions.
5. Examine how precipitation influences the availability of water, which is crucial for life, thus affecting the distribution and diversity of species across different regions.