Answer:
The chemical feature of each group is: native elements – only one element; silicates – silica tetrahedron; phosphates – phosphate tetrahedron; carbonates – one carbon atom with three oxygen atoms; halides – a halogen bonded with a metallic atom; oxides – a metal combined with oxygen; sulfates – sulfur and oxygen
The hedgehog ligans activate it
Adjustment knobs are used to focus light in a light microscope
Hematuria, or BLOOD CLOTS IN THE URINE