She felt her 'biological clock' ticking away and wanted to have a baby as soon as possible.
an adopted child who finally found her 'biological' mother
She practices 'biological control' in her gardening.
(..) but we both know it only exists in contradistinction to the higher level distal cause. Which is? You think with your penis. That's a biological impossibility. And you didn't have to come. Oh,right,yes,I could have stayed behind and watch wolowitz try to hit on penny in russian, arabic and farsi. (..)2007 TvShow: The Big Bang Theory Title: Pilot Season: 1 Episode 1