What all observations are evidence of a chemical change?

Previous pagenext pagepage 3 of 10question 3 (1 point)which of the following consist of cells that do not have a nucleus? of the above

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat