Step 1: Concept
Biogeography and Genetic Diversity
Step 2: Meaning
Understanding the relationship between genetic diversity, centres of origin, and specific examples in plant biology.
Step 3: Analysis
Assertion (A) states that Vavilov considered regions with high genetic diversity to be centers of origin for species. Reason (R) indicates that there is a distinction between the center of origin and the center of genetic diversity specifically for tomatoes, suggesting these concepts can differ.
Step 4: Conclusion
Both statements are correct but Reason (R) does not directly explain Assertion (A); rather, it provides additional context about the relationship between centers of origin and genetic diversity in tomatoes.
Final Answer: (B)