Darwin studied actual birds on the Galapagos Islands instead of using a simulation, as you did In
this lab. Studying natural selection In the field can
be challenging. List at least three possible
challenges Darwin might have faced.

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

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