Exam 1: The Science of Biology

You have been assigned to address a problem of overpopulation of species X in a nearby county.One of the members of your team suggests introducing species Y, which is a natural predator of species X, but not normally found in the area.After some discussion, you go ahead and introduce species Y.What aspects of the hierarchical organization may be affected within a period of a several years?

If two different species of fish fossils were found in two different layers of sedimentary rock, what might one infer about the specimens?

The common ancestor that produced the most evolutionary recent derived characters is

While you are riding the ski lift up to the top of the mountain on a very cold day you start to shiver involuntarily.You know that the shivering is your body's attempt to help regulate your body temperature and is an example of what type of mechanism?

Both walnut and Gingko trees lose their leaves in the fall when day length starts decreasing.Based on these observations one may conclude that many tree species will lose their leaves in the fall in response to decreasing day length.This statement is an example of:

The most plausible explanation for the high number of spiders in plot 4 is:

Based on hierarchical levels of biological organization, which of these choices represents the broadest level?