My understanding is that whether we have actual fossil eggs or not, &gt;there are definite differences in the skeleton between an animal that &gt;lays soft eggs like an amphibian does and an animal that lays &gt;hard-shelled eggs.
(My understanding; is; that whether we have actual fossil eggs or not, &gt;there are definite differences in the skeleton between an animal that &gt;lays soft eggs like an amphibian does and an animal that lays &gt;hard-shelled eggs) (an animal; gt; ) (we; have; actual fossil eggs or not) (an animal; lays; )
My understanding an animal we an animal
is gt have lays
that whether we have actual fossil eggs or not, &gt;there are definite differences in the skeleton between an animal that &gt;lays soft eggs like an amphibian does and an animal that lays &gt;hard-shelled eggs
actual fossil eggs or not