How the Plants do math:
If the S molecules stimulate starch breakdown, while the T molecules prevent this from happening, then the rate of starch consumption is set by the ratio of S molecules to T molecules. In other words, S divided by T.
“This is the first concrete example in biology of such a sophisticated arithmetic calculation,” said mathematical modeller Prof Martin Howard, of the John Innes Centre.
And plants know where the sun is, and where water can be found, and a whole boatload of other things. This is not news. The natural world shows processes that are logical and involve scientific and mathematical concepts. A DNA molecule knows what to do, doesn’t it?