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 subsidize healthier foods like fruits and vegetables. The imposition of a sugar tax means that sellers of sugary drinks would have to increase the price of their goods by an amount P2 from the original price X, and then take on the rest of the tax themselves (P1) in the form of lower profit per unit sold. The tax burden on consumers (P2) makes it more expensive for consumers to buy sugary drinks and hence a higher proportion of their incomes would have to be spent to buy the same amount of sugary drinks. This decreases the equilibrium quantity of