# Growth and Reproduction

Source: https://projectgcse.co.uk/biology/plant_biology/growth_and_reproduction

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Growth is the increase in size that most organisms do. It is caused by the making of new protoplasm and usually includes cell division. It can be measured by:

- Increase in mass
- Increase in dried mass (plants)
- Increase in length (roots etc)

Development is the increase in complexity of an organ. The cells that are formed take on different functions as they grow

Reproduction is the making of a new organism

#### **Asexual reproduction**

- One parent
- No gametes
- Mitosis forms offspring which then grow
- Identical genes to parent
- Rapid growth in good conditions
- Keeps varieties the same

#### **Sexual reproduction**

- Two parents
- Gametes present
- Meiosis forms gametes which fuse in pairs
- Different mix of genes
- Survival in new or poor conditions
- Develops new varieties

Examples of Asexual reproduction include: cuttings, bulbs, and runners