Vein deposits of gold and silver are formed by igneous intrusion, and jewelry is made of silver, gold or platinum and is usually set with precious stones. Given these facts, what geological formation must occur for the availability of material for silver jewelry to occur among the following options: - Igneous intrusion - Metamorphic Layers - loose soil - tectonic plates coliding - Physical weathering - Volcanic mountains - permineralization - Sedimentary deposits
Igneous intrusion

Crossing two living things with recessive traits causes their offspring to have that recessive trait, and all mutant traits are recessive. Given these facts, crossing two living things with mutant traits causes their offspring to have what among the following options: - a dominant trait - a cancerous tumor - genetic material - haploid - a genetic disorder - mutant trait - haploid plants - Change colors
mutant trait

The vanes rotating in an electric fan causes air to move, and output of the fan is varied by means of a series of adjustable vanes upstream of the impeller. Given these facts, what is fan speed among the following options: - energy barrier - kinetic energy - fixed - cycles - Winter - static - solid - adjustable
adjustable