which of the following would produce electrons with the fastest velocity from a surface with the threshold energy of 2x10^15 Hz

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.

Show and image of the mixtures or write them

B. a graduated substance