Amineral a. has a chemical formula. c. has a characteristic internal structure. b. occurs naturally. d. all of the above.

The answer is D, as a mineral has all of these characteristics, I hope this helps

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.

16- counting by fours