The melting and subsequent retreat of glaciers is a long process that may take centuries. Why is something so slow considered an extreme disturbance? A. They will never grow back after they melt.
B. They move giant boulders and change the physical shape of the landscape.
C. They leave behind bare rock with no established ecosystem.
D. They strip away trees and destroy everything as they move

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.