The answer will either be auxin or thigmotrope, though it's most likely auxin. Thigmotrope would most likely be for thigmotropism, a plant's response to touch.
Have you got the list of characteristics on you? If not, both contain cells with chloroplasts, which is used to carry out the photosynthesis. Hope this helps.
In a word ... advancement
Answer:
Oswald Avery, Colin MacLeod, and Maclyn McCarty showed that DNA (not proteins) can transform the properties of cells, clarifying the chemical nature of genes. Avery, MacLeod and McCarty identified DNA as the "transforming principle" while studying Streptococcus pneumoniae, bacteria that can cause pneumonia.
Explanation:
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