The historical sequence of fossils found in Earth's rock layers is called the A. Trace Fossil
B. Mold
C. Cast
D. Fossil Record

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real