Name the internal or plant factors that affect the rate of photosynthesis

Answer

To answer the question regarding the internal or plant factors that affect the rate of photosynthesis, we can break it down into several key components:

### Step-by-Step Solution:

1. **Chlorophyll Concentration**:
- Chlorophyll is the green pigment found in plants that is essential for photosynthesis. The amount of chlorophyll present in the chloroplasts directly influences the rate of photosynthesis because it captures light energy needed for the process.

2. **Chloroplast Presence**:
- Chloroplasts are the organelles where photosynthesis takes place. The number and health of chloroplasts in plant cells can affect how efficiently a plant can perform photosynthesis.

3. **Mesophyll Cell Structure**:
- Mesophyll cells are located in the leaves and are responsible for gas exchange and photosynthesis. The arrangement, number, and size of these cells can impact the overall photosynthetic capacity of the plant.

4. **Leaf Orientation and Size**:
- The orientation and size of leaves can affect how much light they receive. Larger leaves or those positioned to maximize light exposure can enhance the rate of photosynthesis.

5. **Water Availability**:
- Water is a raw material for photosynthesis. The availability of water affects the plant's ability to perform photosynthesis, as it is necessary for the light-dependent reactions.

6. **Carbon Dioxide Concentration**:
- The concentration of carbon dioxide (CO2) in the atmosphere around the plant is crucial, as it is one of the primary substrates for the photosynthesis process. Higher concentrations of CO2 can enhance the rate of photosynthesis up to a certain point.

### Summary of Internal Factors:
- Chlorophyll concentration
- Presence and health of chloroplasts
- Structure and arrangement of mesophyll cells
- Orientation and size of leaves
- Availability of water
- Concentration of carbon dioxide