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

Directly under the shell, there is a small pocket of air. The microscopic pores on the egg surface allow the CO2 to escape and fresh air to get in, so a developing bird can breathe.

Kasia

Pietro Minari

animalsbiologybirdseggshard simple questionsnaturephysicszoology

Birds quiz Physics quiz Biology quiz

You will play as

Answers by country

the Netherlands

75%

17%

Sweden

75%

14%

Russia

11%

60%

15%

134

Belarus

14%

60%

17%

Malaysia

13%

59%

21%

Germany

18%

58%

20%

117

the United States

19%

56%

13%

1342

Pakistan

10%

16%

55%

16%

118

Canada

10%

16%

55%

17%

the United Kingdom

20%

54%

14%

368

Australia

18%

54%

20%

Poland

12%

18%

52%

15%

23314

India

25%

51%

14%

1089

Brazil

12%

16%

51%

19%

Unknown

25%

48%

20%

Singapore

37%

46%

Ukraine

20%

14%

45%

17%

169

the Philippines

27%

45%

15%

118

the United Arab Emirates

20%

41%

26%

Greece

10%

34%

41%

13%

What is inside Swiss cheese holes?

Where does the name K2 come from?

name of Polish climber - Jerzy Kukuczka

the fact it's second in height in the world

name of the Karakoram Range

the name "King George II"

Where was Leonardo da Vinci born?

What mainly characterises the landscape of the Sahara desert?