Which of the following is the smallest?

bacteria

viruses

White blood cells

protozoa

Viruses are by far the smallest, their whole "body" is a DNA or RNA code packed in a protein coat. Unlike the rest of the given, they are not living cells.

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Answers by country

Brazil

78%

14%

Russia

75%

12%

104

Pakistan

75%

13%

Ukraine

64%

10%

12%

Republic of Ireland

11%

61%

22%

Austria

57%

14%

28%

the United Kingdom

10%

55%

25%

Australia

53%

36%

Greece

28%

52%

India

15%

51%

14%

18%

185

Belarus

50%

18%

22%

the Philippines

18%

50%

12%

18%

Belgium

16%

50%

25%

Poland

14%

46%

15%

22%

16914

Kazakhstan

12%

43%

12%

31%

the United States

14%

40%

35%

Switzerland

40%

53%

Germany

12%

38%

39%

163

the Netherlands

23%

34%

38%

Italy

34%

47%

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?

Okavango river is famous for its biologically rich delta. What is the river's outlet?

Guinea Bay

Indian Ocean

Red Sea

It doesn't have an outlet to the sea

What country does the equator pass through?