Explain thoroughly. why do so many earthquakes occur along the west coast of the united states? explain using continental drift and seafloor spreading.

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated