question edit history translations

What color is octopus blood?

red

blue

green

yellow

Both squids and octopuses have blue blood. They use an oxygen-carrying molecule in their blood called hemocyanin that contains copper. In cold conditions with low oxygen pressure, hemocyanin oxygen transportation is more efficient than haemoglobin oxygen transportation.

Kasia

7

animalsbloodchemistrycolorsnatureoctopusessea animalszoology

Blood quiz Sea animals quiz Colors quiz

You will play as

Answers by country

Ukraine

4%

89%

4%

1%

66

Republic of Ireland

4%

84%

6%

4%

45

Russia

3%

80%

8%

4%

92

Germany

9%

79%

5%

3%

1168

Singapore

7%

79%

7%

3%

54

Poland

9%

78%

6%

4%

26194

the Netherlands

10%

78%

8%

4%

50

Australia

7%

77%

11%

3%

209

Canada

11%

77%

8%

3%

118

the United Kingdom

9%

76%

8%

4%

672

Unknown

6%

76%

11%

4%

63

Austria

11%

74%

8%

2%

147

the United Arab Emirates

19%

74%

2%

2%

47

the United States

8%

70%

13%

5%

1741

India

8%

69%

14%

4%

1473

Malaysia

4%

69%

17%

4%

81

Switzerland

16%

63%

10%

8%

130

Nigeria

13%

62%

14%

6%

168

the Philippines

15%

60%

19%

3%

155

Pakistan

19%

54%

15%

7%

159

Which blood group is known as "universal donor"?

Which blood type is the least common?

Which protein causes blood to clot?

What is brass composed of?

copper and iron

copper and zinc

copper and lead