Answer:
C. Geologic time scale
Explanation:
The geologic time scale (GTS) is a system of chronological dating that classifies geological strata (stratigraphy) in time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events in geologic history.
I believe the answer is negative and positive feedback loops!
Answer:
papillary muscles
Explanation:
The flaps of the cuspid valves are held in place by the papillary muscles
Answer: Compound-complex sentence
Explanation:
D. White dwarfs are the stars in the lower left region of the H-R diagram
