A geek isn't the skinny kid with a pocket protector and acne. There can be computer geeks video game geeks car geeks military geeks and sports geeks. Being a geek just means that you're passionate about something.
It is from the progeny of this parent cell that we all take our looks we still share genes around and the resemblance of the enzymes of grasses to those of whales is in fact a family resemblance.