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jeka57 [31]
3 years ago
12

Polar bear have small ears because

Biology
2 answers:
Damm [24]3 years ago
7 0
Polar bears have small and rounded ears. These ears are important because they help prevent water entering their ears which could then freeze and damage their ear drums. Also less body heat is lost out of the small ears. Other adaptations of the polar bear include hollow fur that traps hair inside.
Idk if it helps was on google and saw this and was backed up by quora
snow_lady [41]3 years ago
4 0

Answer:

The polar bear's small ears and tail offer less surface area than large ears or tails, and help maintain body warmth. Fat. Polar bears have a layer of fat that can be four inches (10 cm) thick. Although their fur is the primary source of insulation, the fat helps keep heat in as well.

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The average volume of a red blood cell is 87 μ m 3 . The mean concentration of hemoglobin in red blood cells is 0.34 g ⋅ ml − 1
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Answer:

2.956 × 10 ⁻¹¹ g

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The mean concentration of hemoglobin in red blood cell = 0.34 g/ml

average volume of a red blood cell = 87μ m³ where 1 μ m³ = 1 × 10 ⁻¹² ml

average volume = 87 × 1 × 10 ⁻¹² ml  = 87 × 10 ⁻¹² ml

weight of hemoglobin contained in an average red blood cell =  87 × 10 ⁻¹² ml × 0.34 g/ml = 2.956 × 10 ⁻¹¹ g

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