Mammary glands in mammals are modified into:

Options

A. sweat glands
B. sebaceous glands
C. lachrymal glands
D. preen glands

Answer

**Step-by-Step Solution:**

1. **Understanding Mammary Glands**: Mammary glands are specialized organs in mammals responsible for producing milk to nourish their young.

2. **Identifying Modifications**: The question asks what mammary glands are modified from. We need to look at the options provided and analyze them.

3. **Evaluating Options**:
- **Sweat Glands**: These glands are involved in the secretion of sweat. However, they are also modified in mammals to form mammary glands, which produce milk.
- **Sebaceous Glands**: These glands secrete sebum, an oily substance that moisturizes the skin and hair. They do not modify into mammary glands.
- **Lacrimal Glands**: These glands produce tears to lubricate and protect the eyes. They are not related to mammary glands.
- **Preen Glands**: These are found in birds and secrete oil for feather maintenance. They do not have any relation to mammary glands in mammals.

4. **Conclusion**: Based on the analysis, mammary glands in mammals are modified from sweat glands.

5. **Final Answer**: Mammary glands in mammals are modified into sweat glands.

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