Which of the following provides a first line of defense against pathogens? which of the following provides a first line of defense against pathogens? intact skin and mucous membranes complement inflammation antimicrobial proteins

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.

This comparative chart is an example of one that might be used by scientists and law enforcement personnel for identification purposes. the chart represents a technological advance called