In crustaceans, the excretory functions are performed by

Options

A. Antennal glands
B. Green glands
C. Both 1 & 2
D. Malpighian tubules

Answer

**Step-by-Step Solution:**

1. **Identify the Group**: The question pertains to crustaceans, which belong to the phylum Arthropoda.

2. **Understand Excretory Functions**: In arthropods, different groups have different excretory systems. For example, insects have Malpighian tubules as their excretory organs.

3. **Focus on Crustaceans**: In crustaceans, the primary excretory organs are known as green glands.

4. **Location of Green Glands**: These green glands are located near the base of the antennae in crustaceans.

5. **Synonyms of Green Glands**: The green glands are also referred to as antennal glands or maxillary glands. These terms can be used interchangeably.

6. **Evaluate the Options**: The options provided in the question include:
- Antennal glands
- Green glands
- Both 1 and 2
- Malpighian tubules

7. **Determine the Correct Answer**: Since both antennal glands and green glands refer to the same excretory organs in crustaceans, the correct answer is "both 1 and 2." Malpighian tubules are not relevant to crustaceans as they are specific to other arthropods like insects.

**Final Answer**: The excretory functions in crustaceans are performed by both antennal glands and green glands.

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