Autogamy can occur in a chasmogamous flower if

Options

A. pollen matures before maturity of ovule
B. ovules mature before maturity of pollen
C. both pollen and ovules mature simulta- neously
D. both anther and stigma are of equal lengths

Answer

To solve the question "Autogamy can occur in a chasmogamous flower if," we will analyze the conditions under which autogamy, a type of self-pollination, can take place. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand Autogamy
Autogamy is a form of self-pollination where a flower fertilizes itself using its own pollen. This typically occurs in perfect or intersexual flowers, which contain both male (anthers) and female (stigma) reproductive structures.

**Hint:** Autogamy is a type of self-pollination in perfect flowers.

### Step 2: Identify Chasmogamous Flowers
Chasmogamous flowers are those that open up to allow for pollination. They can facilitate both self-pollination (autogamy) and cross-pollination.

**Hint:** Chasmogamous flowers are open flowers that can undergo self-pollination or cross-pollination.

### Step 3: Conditions for Autogamy
For autogamy to occur in chasmogamous flowers, both the pollen and ovule must mature simultaneously. This ensures that the pollen can fertilize the ovule at the right time.

**Hint:** Simultaneous maturation of pollen and ovule is crucial for autogamy.

### Step 4: Evaluate the Options
Now, let’s evaluate the provided options:
1. **Pollen matures before maturity of ovule** - This is incorrect as both must mature together for autogamy.
2. **Ovule matures before maturity of pollen** - This is also incorrect for the same reason.
3. **Both anther and stigma are of equal length** - This does not directly relate to the timing of maturation.
4. **Both pollen and ovule mature simultaneously** - This is the correct condition for autogamy.

**Hint:** Look for the option that states simultaneous maturation of pollen and ovule.

### Step 5: Conclusion
The correct answer is that autogamy can occur in a chasmogamous flower if both pollen and ovule mature simultaneously. This ensures that self-pollination can successfully take place.

**Final Answer:** Autogamy can occur in a chasmogamous flower if both pollen and ovule mature simultaneously.