paramecia will conjugate to increase genetic variation under harsh environment
genetic_mutation is physical_transformation. genetic_alteration_of_food is danger_to_variation. heredity is property. profanation is degradation. asthma is both_hereditary_and_environmentally_influenced. too_much_fruit_will has laxitive_effect colonization is constitution. genetic_variation is situation. punic_tree is tree. vicissitude is variation.