Sap transport proteins. Recent evidence indicates that mobile proteins and RNA are part of the plant's long-distance communication signaling system. Evidence also exists for the directed transport and sorting of macromolecules as they pass through plasmodesmata." A large number of insects of the order Hemiptera (the half-wings), feed directly on phloem sap, and make it the primary component of their diet. Phloem sap is "nutrient-rich compared with many other plant products and generally lacking in toxins and feeding deterrents, [yet] it is consumed as the dominant or sole diet by a very restricted range of animals". This apparent paradox is explained
Sugary drink tax an additional import duty of 75 pence per litre on sugar-sweetened carbonated drinks with more than 15 grams of sugar per litre. The measure was introduced in May 2014 as part of a number of measures to tackle obesity on the island and the resulting high incidence of type 2 diabetes. Tonga has a soda tax. Sugary drink tax A sugary drink tax or soda tax is a tax or surcharge designed to reduce consumption of drinks with added sugar. Drinks covered under a soda tax often include carbonated soft drinks, sports drinks and energy drinks. The tax is a