Evolution Pace & Patterns Crossword Puzzle

QUESTIONS LIST:

• gradual change : this model of evolutionary change involves slow changes over long periods of time.
• punctuated equilibrium : this model of evolutionary change involves intermittent short bursts of dramatic, rapid changes, followed by long periods of time when few changes happen.
• constant : the gradual change model of evolutionary change is based on the observation that an organism’s environment tends to be quite _ , and natural selection pressures on it do not change rapidly.
• catastrophic : the punctuated equilibrium model of evolutionary change includes a series of these types of events, such as earthquakes, floods and fire, which seriously affect organisms.
• evolution : this can be defined as changes to gene frequencies in a population or species.
• convergent : in this type of evolutionary pattern, members of different species come to look more like one another as they adapt to similar environments.
• analogous : convergent evolution can result in these types of structures, which look similar, but are of different origin.
• complex eyes : this is an example of an analogous structure found in vertebrates, cephalopods and arthropods.
• divergent : in this type of evolutionary pattern, while members of a species become more similar to one species, it becomes less similar to another species.
• homologous : divergent evolution can result in these types of structures, which are anatomically similar structures, but have different functions.
• forelimb : this is an example of a homologous structure found in these bones of humans, dogs, birds and whales.
• common ancestor : it is from the concept of this organism that later organisms diverge but retain homologous structures.