What is the joint of the ulna and humerus called?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

What molecules does hemoglobin decay into over time

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