Invasive species are a major concern for the ecology of sand dunes.
_____ (Q) Because they are not native to the region, they often have no natural predators or other controls.
_____ (R) As they did not evolve along with all the other species in the area, they provide limited habitat values.
_____ (S) Scotch Broom and European Beachgrass are two common examples.
_____ (T) Some invasive species are so well-established that their eradication is not feasible without substantial cost and effort.
_____ (U) Therefore, invasive species can create dense monocultures that crowd out other species.
Route 66's decline began around the same time On the Road was published.
_____ (Q) To keep up with growing traffic demands, pieces of Route 66 were slowly upgraded to, replaced by or became supplementary to new four-lane highways.
_____ (R) Route 66's last stretch in Arizona was decommissioned when I-40 was completed in 1984 and, the following year, the entire route was decommissioned.
_____ (S) Inspired by the German autobahn he had seen during World War II, Eisenhower sought to make the highways more efficient.
_____ (T) In 1956 President Eisenhower enacted the Federal Aid Highway Act.
_____ (U) By the 1970s, the route was largely replaced by five different interstates including Interstate 40, serving most of the Southwest, which replaced the longest portion of the route.
What harm can having too little of a vitamin do?
_____ (Q) This is because the human body needs vitamin B12 to make red blood cells, nerves, DNA, and to carry out other functions.
_____ (R) Over the course of two months, a 62-year-old man developed numbness and a “pins and needles” sensation in his hands, had trouble walking, experienced severe joint pain, and became progressively short of breath.
_____ (S) The average adult should get 2.4 micrograms a day, but, like most vitamins, B12 can’t be made by the body: it must be gotten from food or supplements.
_____ (T) The cause was a lack of vitamin B12 in his bloodstream, according to a case report from Harvard-affiliated Massachusetts General Hospital published in The New England Journal of Medicine.
_____ (U) It could have been worse—a severe vitamin B12 deficiency can lead to deep depression, paranoia and delusions, memory loss, loss of taste and smell, and more.
The name "Anasazi" has come to mean "ancient people," although the word itself is Navajo, meaning "enemy ancestors."
_____ (Q) Subsequently some archaeologists who would try to change the term have worried that because the Pueblos speak different languages, there are different words for "ancestor," and using one might be offensive to people speaking other languages.
_____ (R) Wetherill knew and worked with Navajos and understood what the word meant.
_____ (S) The term was first applied to ruins of the Mesa Verde by Richard Wetherill, a rancher and trader who, in 1888-1889, was the first Anglo-American to explore the sites in that area.
_____ (T) The name was further sanctioned in archaeology when it was adopted by Alfred V. Kidder, the acknowledged dean of Southwestern Archaeology.
_____ (U) Kidder felt that is was less cumbersome than a more technical term he might have used.
On Christmas Eve, many German soldiers put up Christmas trees, decorated with candles, on the parapets of their trenches.
_____ (Q) Instead of trickery, however, the British soldiers heard many of the Germans celebrating.
_____ (R) Hundreds of Christmas trees lighted the German trenches and although British soldiers could see the lights, it took them a few minutes to figure out what they were from.
_____ (S) British soldiers were ordered not to fire but to watch them closely.
_____ (T) Indeed, occasionally the guttural tones of a German were to be heard shouting out lustily, 'A happy Christmas to you Englishmen!'
_____ (U) Time and again during the course of that day, the Eve of Christmas, the sounds of singing and merry-making wafted toward the English.
Answers are below:
Invasive species ------> 2,4,1,5,3 ----> 2=Q, 4=R, 1=S, 5=T, 3=U
Route 66 --------> 3,5,2,1,4
B12 -------> 4,1,5,2,3
Anasazi ------> 5,2,1,3,4
X-Mas Truce ------> 3,1,2,5,4