Growth of pollen tube, leaf are measured respectively in

Options

A. number of cells, surface area.
B. length, surface area.
C. surface area, increase in size.
D. only number of cells.

Answer

To solve the question regarding the measurement of growth in pollen tubes and leaves, we can follow these steps:

### Step 1: Understand the Growth of Pollen Tubes
- Pollen tubes grow from the pollen grain towards the ovule (egg). The growth can be quantified by measuring the length of the pollen tube as it elongates during fertilization.

### Step 2: Understand the Growth of Leaves
- Leaves grow in size over time. The growth of a leaf can be measured by assessing its surface area, which increases as the leaf expands and matures.

### Step 3: Identify the Correct Measurement Criteria
- For pollen tubes, the growth is measured in terms of **length**.
- For leaves, the growth is measured in terms of **surface area**.

### Step 4: Evaluate the Options
- Now, we need to evaluate the provided options to find the one that correctly matches the measurements:
- Option 1: Number of cells for pollen tube and surface area for leaf (Incorrect)
- Option 2: Length for pollen tube and surface area for leaf (Correct)
- Option 3: Length for pollen tube and number of cells for leaf (Incorrect)
- Option 4: Number of cells for pollen tube and length for leaf (Incorrect)

### Conclusion
- The correct answer is **Option 2: Length for pollen tube and surface area for leaf**.