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
flagAustralia
5%
13%
63%
17%
135
flagSpain
10%
6%
61%
18%
60
flagMalaysia
4%
17%
60%
16%
73
flagBrazil
9%
18%
59%
10%
200
flagthe United States
6%
18%
58%
12%
1560
flagGermany
8%
16%
58%
15%
451
flagPakistan
9%
16%
57%
14%
142
flagNigeria
3%
18%
57%
13%
76
flagBelarus
10%
16%
56%
16%
97
flagItaly
7%
14%
56%
17%
67
flagthe United Kingdom
7%
18%
55%
16%
549
flagRussia
13%
13%
55%
14%
504
flagPoland
12%
17%
53%
14%
26478
flagCanada
11%
20%
52%
16%
105
flagIndia
5%
25%
51%
14%
1440
flagUkraine
17%
12%
50%
16%
591
flagUnknown
6%
25%
48%
20%
75
flagSwitzerland
10%
12%
48%
28%
50
flagKazakhstan
14%
21%
45%
16%
122
flagthe Philippines
9%
27%
43%
16%
151

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