A phenotype is a "set of observable characteristics of an individual"
hope this helps :D
The appropriate response is biochemistry. Eduard Buchner showed that aging can be achieved utilizing dead chemicals as opposed to living yeast. He built up that biochemical responses are conceivable outside living cells. He was awarded a Nobel Prize in the year 1907 for his discovery on fermentation.
Circulatory system because, movement causes circulation and movement is only possible by our muscles.
Answer:
nuclei, mitochondria and chloroplasts
