In species that lay eggs with shells use internal or external ferilization? Why/why not?

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In species that lay eggs with shells use internal or external ferilization? Why/why not?

2007-06-27 05:14:24 · 3 answers · asked by mara 1 in Science & Mathematics ➔ Zoology

3 answers

Internal. Before the egg is laid, there is a time when the shell is not yet hard. That is when it is fertilized. By the time it has a hard shell, NOTHING is supposed to go through the shell -- it's there to protect the egg.

I hope this helps!

2007-06-27 05:18:19 · answer #1 · answered by math guy 6 · 0⤊ 0⤋

Has to be internal to achieve fertilization before the shell is formed.

2007-06-27 12:22:09 · answer #2 · answered by gfulton57 4 · 0⤊ 0⤋

I thought snakes had both external and internal fertilization.

2007-06-27 12:32:17 · answer #3 · answered by BotanyDave 5 · 0⤊ 0⤋