Answer:
A cell that contains a nucleus and other membrane bound organelles.
Explanation:
The layers below this layer are older than 10,000 years old
A. Experimentation
b. Theory
c. Supported
d. Rejected
e. Related
f. Questions
It would be letter D - A mutation occurs in one copy of the original gene.
Mutation is the changing of a structure of a gene that can be passed down to the next generations. It is the source of all evolution. As mutation progress through time, it leads to evolution.