Fimbriae is the word you're looking for
They help because if you can adapt to things a camouflage evolution will be eaiser.
Answer:
genetic trait=eye color (a)
environmentally influenced trait=the language you speak (b).
One of the factor that make women more susceptible than men to urinary tract infection is because male have longer urethra while female have shorter urethra.this make infectious agent to reach the bladder more easily through the short female urethra than through the longer male urethra.women are affected 50-60 times as often to men
