Adna segment removed from neurospora
(a pink mold) contained the base sequence
g-t-c-c-a-t-g-c-a. a similar segment of
dna removed from neurospora that had been
exposed to radiation for several hours had the
base sequence g-t-c-c-a-t. this change in the
base sequence is an example of
(1) a deletion (3) a substitution
(2) an insertion (4) a replication

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.