Reading Comprehension (RC) | Re: All of the cells in a particular plant start out with the same

1. according to the passage, the five well-known plant hormones are not useful in controlling the growth of crops because
(a) it is not known exactly what functions the hormones perform
(b) each hormone has various effects on plants
>> unlike the oligosaccharins, the five well-known plant hormones are pleiotropic rather than specific,
(c) none of the hormones can function without the others
(d) each hormone has different effects on different kinds of plants
(e) each hormone works on only
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