Green glands are

Options

A. Respiratory organs in insects
B. Excretory organs in insects
C. Respiratory organs in crustaceans
D. Excretory organs in crustaceans

Answer

**Step-by-Step Solution:**

1. **Understanding Green Glands:**
- Green glands, also known as antennary glands, are specialized structures found in certain animals.

2. **Identifying the Organism:**
- Green glands are primarily associated with crustaceans, which are a class of arthropods that include crabs, lobsters, and shrimp.

3. **Function of Green Glands:**
- The primary function of green glands is excretion. They help in the removal of waste products from the body of crustaceans.

4. **Location of Green Glands:**
- Green glands are located on either side of the head region of crustaceans, specifically at the base of the antennae.

5. **Evaluating the Options:**
- The question presents four options regarding the function of green glands:
- A) Respiratory organs in insects
- B) Excretory organ in insects
- C) Respiratory organs in crustaceans
- D) Excretory organs in crustaceans

6. **Analyzing Each Option:**
- Option A is incorrect because insects have trachea and spiracles for respiration, not green glands.
- Option B is incorrect as insects utilize Malpighian tubules for excretion, not green glands.
- Option C is incorrect since crustaceans respire through gills, not green glands.
- Option D is correct because green glands are indeed the excretory organs in crustaceans.

7. **Conclusion:**
- Therefore, the correct answer is **D) Excretory organs in crustaceans**.

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