It is becuase those people came from different places and mated with others leading to a combination of dirrerent traits.
Didn’t include the functions
I believe the answer is quite simple.
She must've compared the clothing washed with the new detergent with the old one. Jenny must've looked for stains, odour, etc. These would help determine whether or not the new detergent worked better.
Answer:
To absorb light and use carbon dioxide to produce glucose and oxygen. The process is called photosynthesis.
