variation is the raw material on which natural selection can act. the two morphs used in this lab differ at the body color locus. list three aspects of phenotypic variation that you might reasonably expect to see among plants:

Late at night some traffic signals change patterns and become ?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.

Which of the following groups of people is affected by economic laws and rules? a. individual consumers b. firms, both large and small c. governments d. all of the above