Question
Pisces are exclusively aquatic animals. Which of the following is NOT a characteristic of them?
This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
They are warm-blooded.
Pisces Characteristics Analysis
The question asks to identify which statement is NOT a characteristic of Pisces (fish).
Understanding Pisces Physiology
- Pisces are exclusively aquatic vertebrates.
- Most fish possess specific traits related to their aquatic environment and physiology.
Evaluating the Options
- Two-chambered heart: Fish hearts typically have two chambers (one atrium and one ventricle). This is a characteristic feature.
- Gill Respiration: Fish obtain dissolved oxygen from water using gills. This is a defining characteristic.
- Warm-blooded: Fish are generally cold-blooded (ectothermic). Their body temperature fluctuates with the surrounding water temperature. Warm-blooded (endothermic) animals regulate their body temperature internally. Therefore, being warm-blooded is NOT a characteristic of fish.
- Skin covered with scales: The skin of most fish is covered with scales for protection. This is a common characteristic.
Conclusion
Based on the analysis, the statement 'They are warm-blooded' is incorrect for Pisces. Fish are cold-blooded.
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