Bone marrow can be found in the many hollow spaces in type of bone.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

When plants use sunlight to make food, the energy of sunlight is

Creating new things to solve problems and improve life depends on the close interaction of which two fields?