questionedithistorytranslations

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.
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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
answers
flagAustria
4%
20%
68%
8%
50
flagAustralia
5%
13%
63%
17%
132
flagMalaysia
2%
18%
60%
16%
71
flagRepublic of Ireland
8%
10%
60%
20%
48
flagthe United States
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18%
58%
12%
1543
flagBrazil
9%
18%
58%
10%
187
flagSpain
10%
7%
58%
20%
55
flagPakistan
9%
16%
57%
14%
141
flagBelarus
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16%
57%
16%
96
flagNigeria
3%
18%
57%
13%
76
flagGermany
8%
17%
56%
15%
427
flagRussia
13%
13%
55%
15%
477
flagthe United Kingdom
7%
18%
54%
16%
539
flagPoland
12%
17%
53%
14%
26332
flagCanada
11%
20%
52%
16%
105
flagIndia
5%
25%
51%
14%
1427
flagUkraine
17%
12%
49%
16%
561
flagUnknown
6%
25%
48%
20%
75
flagKazakhstan
16%
21%
45%
14%
111
flagthe Philippines
8%
28%
44%
16%
150

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