Based on this study, which of the following is true?
a. The researchers have proven their theory.
b. The researchers have evidence to support their hypothesis.
c. The data from the experiment is inconclusive.
d. The researchers must run several more similar trials before their hypothesis is proven.
B
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Experiments suggest that the KNOX protein is closely associated with the plant hormone in the induction of leaf primordial.
A. auxin B. ethanol C. abscisic acid D. ethylene E. gibberellic acid
Secondary metabolites may be antibiotics
Indicate whether this statement is true or false.
Based on genetic comparisons,
a. people of different races often have more genetic similarities than many individuals within a race. b. humans have a more ancient origin than chimpanzees. c. there is much genetic diversity among cheetahs. d. among humans, many genetic variations are restricted to certain racial groups. e. there is no difference between different races of humans.
The first eukaryotic fossils are dated to about ____.
A. 2.7 billion years ago B. 1.8 billion years ago C. 1.5 billion years ago D. 750 million years ago E. 201 million years ago