The number of pollen grains, produced by each head inflorescene of family Asteraceae having 10 actinomorphic flowers (if each anther produces 20 pollen grains), are

Options

A. 300
B. 500
C. 800
D. 1000

Explanation

To solve the problem of calculating the number of pollen grains produced by each head inflorescence of the family Asteraceae with 10 actinomorphic flowers, follow these steps:

### Step-by-Step Solution:

1. **Identify the number of flowers**: The problem states that there are 10 actinomorphic flowers in the inflorescence.

2. **Determine the number of anthers per flower**: In the Asteraceae family, each flower typically has 5 anthers.

3. **Calculate the total number of anthers**: Multiply the number of flowers by the number of anthers per flower:
\[ \text{Total anthers} = \text{Number of flowers} \times \text{Number of anthers per flower} = 10 \times 5 = 50 \text{ anthers} \]

4. **Determine the number of pollen grains produced by each anther**: The problem states that each anther produces 20 pollen grains.

5. **Calculate the total number of pollen grains**: Multiply the total number of anthers by the number of pollen grains produced by each anther:
\[ \text{Total pollen grains} = \text{Total anthers} \times \text{Pollen grains per anther} = 50 \times 20 = 1000 \text{ pollen grains} \]

6. **Conclusion**: Therefore, the total number of pollen grains produced by each head inflorescence of the family Asteraceae is 1000.

### Final Answer:
The number of pollen grains produced by each head inflorescence of family Asteraceae is **1000**.

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