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

77%

11%

Australia

14%

70%

the United States

19%

59%

12%

132

Colombia

16%

22%

50%

11%

Poland

30%

47%

16%

2452

India

11%

24%

43%

18%

104

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27%

41%

22%

the Netherlands

33%

37%

25%

Italy

26%

35%

28%

194

Spain

40%

33%

21%

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32%

16%

32%

18%

Belarus

20%

32%

40%

Kazakhstan

20%

12%

29%

33%

Brazil

36%

26%

27%

Russia

35%

25%

32%

118

Ukraine

40%

25%

21%

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48%

14%

25%

11%

Austria

43%

12%

17%

25%

Germany

45%

11%

16%

25%

342

Switzerland

37%

15%

28%

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?

What is the inventive hunting technique of humpback whales?

Do moles eat plant roots?

Yes, but only during spring

Yes, but only young moles

Yes, often