Which mammals tolerate exceptionally high levels of carbon dioxide?

rats

horses

moles

bats

Moles are adapted to survive in low-oxygen environments such as underground burrows. They tolerate higher levels of carbon dioxide than other mammals because their blood cells contain a special form of hemoglobin.

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Estonia

78%

10%

Australia

14%

67%

10%

the United States

16%

64%

11%

171

the United Kingdom

24%

48%

19%

109

Poland

30%

47%

16%

2626

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21%

47%

24%

251

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21%

47%

10%

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12%

25%

42%

17%

107

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34%

37%

24%

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41%

32%

20%

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34%

13%

29%

20%

Belarus

25%

28%

39%

Kazakhstan

24%

12%

28%

32%

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36%

26%

27%

Russia

36%

25%

30%

123

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48%

14%

25%

11%

Germany

40%

10%

24%

23%

412

Ukraine

41%

24%

20%

Austria

46%

12%

16%

24%

Switzerland

38%

14%

29%

How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start

Oxygen is created during protein reduction

Oxygen comes in through pores in the shell

They don't need oxygen at all

Which dogs are known to eat fish?

Where is it NOT possible to find a penguin?

in Iceland

in Africa

on Galapagos Islands (near equator)

in South America

Do moles eat plant roots?

Yes, but only during spring

Yes, but only young moles

Yes, often