Penguins
yes birds lay eggs
all birds lay eggs.
Yes, they are birds and birds lay eggs.
Yes All birds lay eggs
They lay eggs
birds lay eggs
They don't. Birds lay eggs.
Like most birds it is possible for penguins to lay unfertilized eggs but it doesn't happen very often.
amphibians lay eggs, and positively birds lay eggs.
Yes, all birds lay eggs.
No. Birds do not lay clear eggs at all to my knowledge.