why do you think the eggs of birds are so much bigger than those of humans??

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why do you think the eggs of birds are so much bigger than those of humans??

2006-08-28 01:51:17 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help

3 answers

A bird egg has to contain all the nutrients necessary to sustain a fetal bird for weeks. It also has to have enough space to hold waste products for weeks. In mammals (such as humans) the fertilized ovum gets nourished by the mother through a placenta, so there is no need to store nutrients.

2006-08-28 01:59:51 · answer #1 · answered by pvreditor 7 · 2⤊ 0⤋

I have no idea

2006-08-28 01:57:41 · answer #2 · answered by angeleloves 3 · 0⤊ 1⤋

i dont know

2006-08-28 02:09:28 · answer #3 · answered by Anonymous · 0⤊ 1⤋