Problem: Please answer a question about the following article about Botany:
Plants synthesize a number of unique polymers like the polysaccharide molecules cellulose, pectin and xyloglucan from which the land plant cell wall is constructed. Vascular land plants make lignin, a polymer used to strengthen the secondary cell walls of xylem tracheids and vessels to keep them from collapsing when a plant sucks water through them under water stress. Lignin is also used in other cell types like sclerenchyma fibers that provide structural support for a plant and is a major constituent of wood. Sporopollenin is a chemically resistant polymer found in the outer cell walls of spores and pollen of land plants responsible for the survival of early land plant spores and the pollen of seed plants in the fossil record. It is widely regarded as a marker for the start of land plant evolution during the Ordovician period. The concentration of carbon dioxide in the atmosphere today is much lower than it was when plants emerged onto land during the Ordovician and Silurian periods. Many monocots like maize and the pineapple and some dicots like the Asteraceae have since independently evolved pathways like Crassulacean acid metabolism and the C4 carbon fixation pathway for photosynthesis which avoid the losses resulting from photorespiration in the more common C3 carbon fixation pathway. These biochemical strategies are unique to land plants.
What polymer is used to strengthen cell walls?
A: lignin
Problem: Please answer a question about the following article about John Kerry:
With the continuing controversy that had surrounded the military service of George W. Bush since the 2000 Presidential election (when he was accused of having used his father's political influence to gain entrance to the Texas Air National Guard, thereby protecting himself from conscription into the United States Army, and possible service in the Vietnam War), John Kerry's contrasting status as a decorated Vietnam War veteran posed a problem for Bush's re-election campaign, which Republicans sought to counter by calling Kerry's war record into question. As the presidential campaign of 2004 developed, approximately 250 members of a group called Swift Boat Veterans for Truth (SBVT, later renamed Swift Vets and POWs for Truth) opposed Kerry's campaign. The group held press conferences, ran ads and endorsed a book questioning Kerry's service record and his military awards. The group included several members of Kerry's unit, such as Larry Thurlow, who commanded a swift boat alongside of Kerry's, and Stephen Gardner, who served on Kerry's boat. The campaign inspired the widely used political pejorative 'swiftboating', to describe an unfair or untrue political attack. Most of Kerry's former crewmates have stated that SBVT's allegations are false.
What military branch was George W. Bush in?
A: the Texas Air National Guard
Problem: Please answer a question about the following article about Canadian Armed Forces:
Only service dress is suitable for CAF members to wear on any occasion, barring "dirty work" or combat. With gloves, swords, and medals (No. 1 or 1A), it is suitable for ceremonial occasions and "dressed down" (No. 3 or lower), it is suitable for daily wear. Generally, after the elimination of base dress (although still defined for the Air Force uniform), operational dress is now the daily uniform worn by most members of the CF, unless service dress is prescribed (such as at the NDHQ, on parades, at public events, etc.). Approved parkas are authorized for winter wear in cold climates and a light casual jacket is also authorized for cooler days. The navy, most army, and some other units have, for very specific occasions, a ceremonial/regimental full dress, such as the naval "high-collar" white uniform, kilted Highland, Scottish, and Irish regiments, and the scarlet uniforms of the Royal Military Colleges.
What is suitable for CAF members to wear on any occasion?
A: service dress
Problem: Please answer a question about the following article about Insect:
Insects are the only invertebrates to have developed active flight capability, and this has played an important role in their success.:186 Their muscles are able to contract multiple times for each single nerve impulse, allowing the wings to beat faster than would ordinarily be possible. Having their muscles attached to their exoskeletons is more efficient and allows more muscle connections; crustaceans also use the same method, though all spiders use hydraulic pressure to extend their legs, a system inherited from their pre-arthropod ancestors. Unlike insects, though, most aquatic crustaceans are biomineralized with calcium carbonate extracted from the water.
Insects have developed what kind of active capability?
A:
flight