Pollen grains are generally __________ in outline measuring __________micrometers in diamet er

Options

A. spherical 25-50
B. long 25-50
C. oval 10-25
D. spehrical 75-100

Answer

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

1. **Understanding the Question**: The question asks for the shape and size of pollen grains. Pollen grains are the male gametes in flowering plants, and their characteristics are important for understanding plant reproduction.

2. **Identifying the Shape of Pollen Grains**: Pollen grains are generally described as having a specific shape. Upon examination, they are typically **aspherical** in outline. This means they do not conform to a perfect sphere but have a somewhat rounded shape.

3. **Measuring the Size of Pollen Grains**: The question also requires the measurement of pollen grains in micrometers. Pollen grains usually measure between **25 to 50 micrometers** in diameter. This range is standard for most pollen grains found in flowering plants.

4. **Final Answer**: Therefore, the complete answer to the question is: "Pollen grains are generally **aspherical** in outline measuring **25 to 50 micrometers** in diameter."

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