. the medium ground finch (geospiza fortis) and the cactus finch (geospiza scandens) are similar in size and appearance. a. which physical trait varies the most between these two species? b. the medium ground finch and the cactus finch are adapted to consume different types of foods. can you think of a situation in which the medium ground finches would have a survival advantage over the cactus finches? a disadvantage?