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

18%

60%

11%

138

Colombia

16%

22%

50%

11%

Poland

30%

47%

16%

2484

India

11%

24%

42%

18%

105

the United Kingdom

27%

41%

22%

the Netherlands

33%

37%

25%

Italy

26%

35%

29%

196

Spain

40%

32%

21%

France

33%

15%

30%

17%

Belarus

23%

30%

38%

Kazakhstan

20%

12%

29%

33%

Brazil

36%

26%

27%

Russia

35%

25%

31%

120

Ukraine

40%

25%

21%

Uruguay

48%

14%

25%

11%

Germany

44%

12%

17%

25%

349

Austria

43%

12%

17%

25%

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