[Solved] Bacterial oxidation of Fe²⁺ occurs BEST under which environmental condition? A) cold temperature B) high sunlight C) low (acidic) pH D) nutrient-replete Microscopic Examination: The study or analysis of materials using a microscope to view details not visible to the naked eye. Conception: The moment when a sperm fertilizes an egg, leading to the beginning of pregnancy. Testicular: Related to the testes, the male reproductive glands that produce sperm and testosterone. Uterus: A female reproductive organ in mammals, including humans, where offspring are conceived and in which they gestate before birth.