How was the cretaceous period different from the jurassic period? ?

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

The type of fossil where the name literally means "turning to stone".