El CH₂ + 202 + CO₂
2 H₂O reacción química​

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.

Rn in the right answer

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.