Species Diversity

The correct matching between List I and List II is as follows:

Explanation:

• Robert May is known for his work on estimating global species diversity, which is around 7 million.
• Alexander von Humboldt introduced the concept of the species-area relationship.
• Paul Ehrlich proposed the "Rivet Popper Hypothesis," suggesting the ecological importance of species.
• David Tilman conducted long-term ecosystem experiments using outdoor plots to study biodiversity and ecosystem function.

Thus, the correct pairing is: A-III, B-I, C-IV, D-II.

Tropical regions exhibit the greatest level of species richness due to several factors that contribute to the variety and abundance of species. Let's analyze each option:

• A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification. - This statement is correct. The stability of tropical regions over geological time has allowed species to evolve and diversify, increasing richness.
• B. Tropical environments are more seasonal. - This is not true. Tropical environments are typically less seasonal compared to temperate regions, which experience significant seasonal changes.
• C. More solar energy is available in tropics. - Correct. The abundant sunlight in tropical areas fuels photosynthesis, supporting a greater biomass and a wider variety of organisms.
• D. Constant environments promote niche specialization. - Accurate. The stable climate of the tropics allows species to adapt to specific niches, facilitating specialization and diversity.
• E. Tropical environments are constant and predictable. - True. The predictability of tropical climates supports the development and maintenance of diverse ecosystems.

Based on the analysis, the correct answer is:

A, C, D and E only

To solve the problem of matching List I with List II, we need to understand each term in both lists. Here are the details:

• Rose: Roses typically have perigynous flowers where sepals, petals, and stamens are attached around the edge of a concave structure and not directly beneath a superior ovary, which matches with II.
• Pea: Peas exhibit marginal placentation, where ovules are attached to a single ridge forming the placenta. This matches with IV.
• Cotton: The flower of cotton shows twisted aestivation, where petals overlap in a twisted manner, which corresponds to I.
• Mango: Mango develops from a single ovary and forms a drupe, a type of fruit with a fleshy outer layer surrounding a single seed, which matches with III.

Therefore, the correct matching is A-II, B-IV, C-I, D-III.