An example is sexual dimorphism<span>. This refers to differences between the phenotypes of males and females of the same </span>species<span>. In humans, for example, males and females have different heights and body shapes.</span>
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That they lack true leaves and roots I hope this helps you! :D
In reality this is way too little information to go on, and it would be irresponsible to make any assumptions about an individual based on what was provided here alone, but for the sake of merely answering a High School Bio question:
the answer is A. OCD.
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<u>I added an answer I am afraid it was wrong and I am new I don't know how to delete an answer, so I just edited and wrote this</u>
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