Antherozoids of both funaria and pteris were released together near the archegonia of pteris. Only its sperms enter the archegonia as

Options

A. Pteris archegonia repel funaria sperms
B. Funaria sperms get killed by pteris sperms
C. Funaria sperms are less mobile
D. Pteris archegonia release chemical to attract its sperms

Answer

To solve the question, we need to analyze the scenario involving the antherozoids (male gametes) of Funaria and Pteris, and their interaction with the archegonia (female reproductive structures) of Pteris. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Role of Archegonia
Archegonia are the female reproductive structures in plants like Pteris, which is a fern. They play a crucial role in fertilization by attracting male gametes (sperms).

**Hint:** Remember that archegonia are designed to attract and facilitate the entry of male gametes for fertilization.

### Step 2: Identify the Male Gametes
In this scenario, we have male gametes from two different species: Funaria (a moss) and Pteris (a fern). The question specifies that both types of antherozoids are released near the archegonia of Pteris.

**Hint:** Different species may have different mechanisms for attracting their specific male gametes.

### Step 3: Analyze the Options
We need to evaluate the provided options regarding why only the sperms of Pteris enter the archegonia:

1. **Pteris archegonia repel Funaria sperms.**
2. **Funaria sperms get killed by Pteris sperms.**
3. **Funaria sperms are less mobile.**
4. **Pteris archegonia release chemicals to attract its sperms.**

**Hint:** Consider the physiological and chemical interactions that occur during fertilization.

### Step 4: Evaluate Each Option
- **Option 1:** Pteris archegonia repel Funaria sperms.
This is incorrect; archegonia do not repel other species' sperms.

- **Option 2:** Funaria sperms get killed by Pteris sperms.
This is also incorrect; there is no evidence of one species' sperms killing another.

- **Option 3:** Funaria sperms are less mobile.
This is misleading; Funaria sperms are motile and can swim.

- **Option 4:** Pteris archegonia release chemicals to attract its sperms.
This is correct. The archegonia of Pteris secrete malic acid, which specifically attracts the sperms of Pteris.

**Hint:** Focus on the chemical signaling involved in plant reproduction.

### Step 5: Conclusion
The correct answer is that Pteris archegonia release chemicals to attract its sperms. This mechanism ensures that only the appropriate male gametes reach the archegonia for successful fertilization.

**Final Answer:** Pteris archegonia release chemical to attract its sperms.