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A well developed echo-apparatus (a kind ...

A well developed echo-apparatus (a kind of radar) is present in flying mammals belong to order

A

Primate

B

Insectivore

C

Rodentia

D

Chiroptera

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**Step-by-Step Solution:** 1. **Identify the Question**: The question asks about the order to which flying mammals with a well-developed echo apparatus (radar) belong. 2. **Understand the Key Terms**: - "Flying mammals" refers specifically to mammals that can fly. - "Well-developed echo apparatus" indicates the use of echolocation, a biological sonar used by some animals. 3. **Recognize the Flying Mammals**: The only mammals that are capable of true flight are bats. 4. **Determine the Correct Order**: - Bats belong to the order **Chiroptera**. This order is characterized by the presence of wings formed by a membrane stretched between elongated fingers, allowing them to fly. 5. **Evaluate the Options**: - Option 1: Primate - This is incorrect as primates include monkeys and apes, not bats. - Option 2: Insectivore - This is incorrect as it includes shrews and moles, not bats. - Option 3: Rodentia - This is incorrect as it includes rodents like rats and squirrels, not bats. - Option 4: Chiroptera - This is the correct order for bats. 6. **Conclusion**: The correct answer is **Chiroptera**. **Final Answer**: The well-developed echo apparatus (a kind of radar) is present in flying mammals that belong to the order **Chiroptera**. ---
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