Define gene bank.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Gene Bank**: A gene bank is a biorepository that stores genetic material. This means it is a facility where genetic resources are preserved for future use.

2. **Types of Genetic Material**: Gene banks collect various types of genetic material from different organisms, including plants, seeds, and animals. This collection helps in conserving biodiversity.

3. **Collection Methods for Plants**: For plants and seeds, gene banks utilize methods such as in vitro storage and freezing of plant cuttings. These techniques help maintain the viability of the genetic material over time.

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