I am really having a hard time completing this question..
Punctuated equilibrium occurs over a relatively ______ period of time, usually as a result of a ________.
http://evolution.berkeley.edu/evosite/evo101/VIIA1bPunctuated.shtml
Thank you so much
You are very welcome.
To answer this question, you need to understand the concept of punctuated equilibrium in evolution. Punctuated equilibrium refers to the idea that species generally undergo long periods of stable existence, with little or no change (equilibrium), followed by relatively short bursts of rapid evolutionary change (punctuation).
To find the missing words, let's break down the question and analyze the available information:
"Punctuated equilibrium occurs over a relatively ______ period of time, usually as a result of a ________."
Based on the definition of punctuated equilibrium, we know that the period of time involved is characterized as relatively short, sudden bursts. So the missing word for the first blank could be "short" or "rapid."
Now, let's focus on the second part of the question. Punctuated equilibrium is usually triggered by a specific event or factor. This event or factor is responsible for causing the rapid evolutionary change. Some common factors that can lead to punctuated equilibrium include environmental changes, selective pressures, or the emergence of new habitats. So the missing word for the second blank could be "factor," "event," or "catalyst."
In summary, the completed sentence could be:
"Punctuated equilibrium occurs over a relatively short period of time, usually as a result of a factor/event/catalyst."