1.   He replaced the nucleus of a frog egg, one large cell, with that of another cell from another frog.

2.   Masui discovered a protein known as MPF, for maturation promoting factor, that controls cell division in fertilized frog eggs.

3.   The eels eat small fish, crayfish, prawns, frogs, frog eggs and tadpoles.

4.   The movie plot, such as it is, hinges on the idea that this DNA could be inserted into modern frog eggs to create living dinosaurs.

5.   Water tests failed to detect pesticides or other pollutants, and frog eggs collected from the ponds developed normally in the laboratory.

6.   Black said these were crushed by the astronauts and the resulting fluid injected onto the frog eggs, many of which became fertilized.