50-years ago Pesticide A killed most mosquito populations in San Antonio. Today, Pesticide A does not work very well, and people have turned to Pesticide B for mosquito control. What might have caused this pattern?

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse