What is normal heart rate for an adult that is sitting quietly?

What do science, technology, and disease have to do with each other?

What type of competition exsist between two species. turtles and fish

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land