Mark whether the following statements are true or false.
(i) Entire collection of plants or seeds having all the diverse alleles for all genes in a given crop is called gene pool.
(ii) A wide range of pathogens affect the yield of cultivated crop species, especially in tropical climates.
(iii) High aspartic acid, low nitrogen and sugar content in maize lead to resistance to aphids.
(iv) Biofortification is the most practical means to improve public health.

Explanation

To determine whether the given statements are true or false, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement (i)**: "Entire collection of plants or seeds having all the diverse alleles for all genes in a given crop is called gene pool."
- **Analysis**: The statement describes a collection of genetic diversity within a crop. However, the correct term for this concept is "germplasm," not "gene pool." A gene pool refers to the total genetic diversity found within a population, but the way it's described here is more aligned with germplasm.
- **Conclusion**: **False**

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