What types of substances do individual cells need to take in/eliminate from their bodies? what are some mechanisms for this?

The substances that individual cells need to take in from their bodies are nutrients that they need for the processes in their organs and they eliminate waste products. Hope this answers the question. Have a nice day. Please feel free to ask more questions.

50%

Explanation:

Iif you do a punnet square you get Bb, Bb, bb, and bb

since blond is represneted by the recessive bb it's a 50% the child will have blond hair