Populations of finches with extremely short beaks and extremely long beaks are increasing while finches with beaks that are of average size are decreasing. What pattern of natural selection does this scenario illustrate? A. stabilizing selection B. directional selection
C. disruptive selection
D. all of the above
E. none of the above

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Match the types of competition to their descriptions