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Very small animals are rarely found in polar regions because
- a)smal animas have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outside
- b)small animals have a smaller surface area relative to their volume, so they lose body heat very fast when it is cold outside
- c)small body volume makes internal heat production very difficult
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Very small animals are rarely found in polar regions becausea)smal ani...
Temperature affects the absolute size of an animal and the relative proportions of various body parts. Birds and mammals attain greater body size in cold regions than in warm areas. But poikilotherms are smaller in cold region. This is Bergman's rule. This is true because small animals have little volume but larger surface area, so if they are in cold, they lose their body heat very fast. In cold climate, reduced surface area to volume ratio is ideal.
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Community Answer
Very small animals are rarely found in polar regions becausea)smal ani...
Explanation:
In polar regions, the environment is extremely cold, making it challenging for small animals to survive. The correct answer is option 'A' - small animals have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outside.
Surface Area to Volume Ratio:
The surface area to volume ratio is an important factor in heat loss. As the size of an object decreases, its surface area to volume ratio increases. This means that smaller objects have a relatively larger surface area compared to their volume.
Heat Loss:
Heat loss occurs through the surface of an animal's body. The greater the surface area, the more heat is lost. In cold environments, animals need to conserve their body heat to maintain their internal temperature.
Polar Regions:
In polar regions, the temperatures can drop significantly, and the environment is characterized by icy conditions. Small animals, such as insects and small mammals, have a higher surface area to volume ratio. This means that their bodies have relatively more surface area exposed to the cold environment compared to their body volume.
Rapid Heat Loss:
Due to their larger surface area relative to their volume, small animals in polar regions lose body heat at a faster rate. This rapid heat loss makes it difficult for them to maintain their internal temperature, leading to decreased survival chances.
Adaptations of Polar Animals:
In contrast, larger animals, such as polar bears and seals, have a smaller surface area to volume ratio. Their larger size allows them to have a smaller proportion of their body exposed to the cold environment, reducing heat loss. Additionally, polar animals have developed various adaptations to survive in the extreme cold, such as thick layers of blubber or fur that provide insulation and reduce heat loss.
Conclusion:
In summary, small animals have a larger surface area relative to their volume, which leads to rapid heat loss in cold environments. This is why very small animals are rarely found in polar regions.
In polar regions, the environment is extremely cold, making it challenging for small animals to survive. The correct answer is option 'A' - small animals have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outside.
Surface Area to Volume Ratio:
The surface area to volume ratio is an important factor in heat loss. As the size of an object decreases, its surface area to volume ratio increases. This means that smaller objects have a relatively larger surface area compared to their volume.
Heat Loss:
Heat loss occurs through the surface of an animal's body. The greater the surface area, the more heat is lost. In cold environments, animals need to conserve their body heat to maintain their internal temperature.
Polar Regions:
In polar regions, the temperatures can drop significantly, and the environment is characterized by icy conditions. Small animals, such as insects and small mammals, have a higher surface area to volume ratio. This means that their bodies have relatively more surface area exposed to the cold environment compared to their body volume.
Rapid Heat Loss:
Due to their larger surface area relative to their volume, small animals in polar regions lose body heat at a faster rate. This rapid heat loss makes it difficult for them to maintain their internal temperature, leading to decreased survival chances.
Adaptations of Polar Animals:
In contrast, larger animals, such as polar bears and seals, have a smaller surface area to volume ratio. Their larger size allows them to have a smaller proportion of their body exposed to the cold environment, reducing heat loss. Additionally, polar animals have developed various adaptations to survive in the extreme cold, such as thick layers of blubber or fur that provide insulation and reduce heat loss.
Conclusion:
In summary, small animals have a larger surface area relative to their volume, which leads to rapid heat loss in cold environments. This is why very small animals are rarely found in polar regions.
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Very small animals are rarely found in polar regions becausea)smal animas have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outsideb)small animals have a smaller surface area relative to their volume, so they lose body heat very fast when it is cold outsidec)small body volume makes internal heat production very difficultd)none of theseCorrect answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Very small animals are rarely found in polar regions becausea)smal animas have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outsideb)small animals have a smaller surface area relative to their volume, so they lose body heat very fast when it is cold outsidec)small body volume makes internal heat production very difficultd)none of theseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Very small animals are rarely found in polar regions becausea)smal animas have a larger surface area relative to their volume, so they lose body heat very fast when it is cold outsideb)small animals have a smaller surface area relative to their volume, so they lose body heat very fast when it is cold outsidec)small body volume makes internal heat production very difficultd)none of theseCorrect answer is option 'A'. Can you explain this answer?.
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