Final answer:
Meteorites like the Murchison meteorite have provided evidence supporting the possibility that organic compounds with an extraterrestrial origin, including amino acids and complex organic molecules, could have been delivered to Earth and contributed to the molecular building blocks of life here.
Step-by-step explanation:
Meteorites have provided evidence that supports the possibility that organic compounds may have arrived on Earth from extraterrestrial sources. Studies of the Murchison meteorite, among others, have shown the presence of amino acids and other complex organic molecules.
These findings suggest that during the period when the solar system was forming, organic materials, including two kinds of amino acids with right-handed and left-handed molecular symmetry, could have been delivered to Earth by primitive meteorites and comets, especially when the planet was too hot for such organic materials to survive. This implies that the molecular building blocks of life on Earth could have an extraterrestrial origin.