Pinus possesses

Options

A. Winged seeds
B. Winged pollen
C. Coralloid roots
D. Both A and B.

Answer

To answer the question "Pinus possesses," we will analyze the characteristics of Pinus, which is a genus of gymnosperms. Here’s a step-by-step solution:

### Step 1: Identify the Type of Plant
Pinus is classified as a gymnosperm. Gymnosperms are seed-producing plants that do not form flowers or fruits. Instead, they produce cones.

**Hint:** Remember that gymnosperms are characterized by their reproductive structures, which are cones.

### Step 2: Understand the Male Cone Structure
Pinus has male cones, also known as male strobili. These cones consist of microsporophylls, which are specialized leaf-like structures that bear microsporangia.

**Hint:** Focus on the term "microsporophylls" as they are crucial in the formation of pollen grains.

### Step 3: Pollen Grain Formation
The microsporangia on the microsporophylls produce pollen grains, which are the male gametes in Pinus. Upon maturity, these pollen grains are released from the male cone.

**Hint:** Pollen grains are essential for reproduction in gymnosperms, so consider their role in fertilization.

### Step 4: Pollen Grain Characteristics
Pollen grains of Pinus are characterized by having two air sacs or wings. These structures help the pollen grains to be lightweight and facilitate their dispersal by wind currents.

**Hint:** The presence of wings on pollen grains is a key feature that aids in their dispersal.

### Step 5: Seed Structure
After fertilization, the seeds of Pinus also develop wings. The upper part of the ovule-bearing scale (vulliferous scale) is peeled off along with the seed to form a wing, allowing the seeds to be carried by the wind.

**Hint:** Consider how the seed structure aids in dispersal, similar to the pollen grains.

### Step 6: Evaluate Other Options
The question may provide multiple options. It is important to note that coralloid roots, which contain nitrogen-fixing cyanobacteria, are not found in Pinus but are present in Cycas. Therefore, this option would be incorrect.

**Hint:** Always check for specific characteristics that differentiate similar plant types.

### Conclusion
Based on the analysis, Pinus possesses winged pollen grains and winged seeds. Therefore, the correct answer is that Pinus possesses both winged pollen grains and winged seeds.

**Final Answer:** Pinus possesses winged pollen grains and winged seeds (Option 4).

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