indicative

and reproductive fitness? I'm doing a lab about plants and need to answer that question... any suggestions? And why?

My dad has complained of a nagging calf pain whenever he walks, which has subsided some. However, his legs are easily worn out when walking short distances. He describes the weakness as pure exhaustion, as if he walked 50 yards in the snow. He went to the doctor and has received a ton of tests...

I think it comes from the idea that a stronger jawline, and any other kinds of more masculine features, are due to higher testosterone levels in the body. And testosterone increases sex drive.