According to embryology, why do fish and birds have a common ancestor?

they both have embryos with gill slits and tails.

they both have embryos with traits that eventually disappear

they both have embryos that develop into adults.

they both have embryos that form from a fertilized egg.

answer:

they both have embryos with traits that eventually disappear

hope i

In order to join stained glass pieces together lead is used

The lead is preferred material as

a) due to its soft and flexible nature we can easily cut and mold it according to the application area

b) Compared to other options lead is less costly and is long lasting

Thus lead finds its application in came glass work