In heterogamous organisms the male gamete and female gametes are called respectively -

Options

A. Spermatogonia, oogonia
B. Spermatid, ootid
C. Antherozoid (sperm), Egg (ovum)
D. Sperm and oospore

Answer

To answer the question regarding the names of male and female gametes in heterogamous organisms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Heterogamous Organisms**: Heterogamous organisms are those that produce two different types of gametes, typically referred to as male and female gametes.

2. **Identify Male Gamete**: In most heterogamous organisms, the male gamete is called a **sperm**. This is the gamete that is usually motile and is responsible for fertilizing the female gamete.

3. **Identify Female Gamete**: The female gamete in these organisms is called an **egg** (or ovum). This gamete is typically larger and non-motile compared to the male gamete.

4. **Conclusion**: Therefore, in heterogamous organisms, the male gamete is called **sperm** and the female gamete is called **egg**.

### Final Answer:
In heterogamous organisms, the male gamete is called **sperm** and the female gamete is called **egg**.

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