Sean drew this diagram and labeled an unknown gas as gas A. Which gas does A represent?
respration
combustion
A.
oxygen
B.
hydrogen
C.
carbon dioxide

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

What two fields of study provide the core information that is used to classify organisms?

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form