The arrangement of element in the modern periodic table is based on?

The arrangement of element in the modern periodic table is based on

metallic left side of modern periodic tablenon metallic right side of modern periodic tablemetaloid in middle of modern periodic table

2positives of biotechnology: 1. plants have become more resistant to viruses and other communicable pests.2. with the of biotechnology, we have been able to produce better tasting fruits as well as vegetables.2 negatives of biotechnology: 1. biotechnology poses a number of environmental threats. genetically modifies crops often infect monarch butterflies and other insect species.2. viruses could combine with crops.