What have scientists learned about the genes of ancient American dogs, and the genes of dogs born in Europe and Asia?

Which piece of evidence would best support reason #1? othe history of using animals for research extends asfar back as 322 bce, when early greek physician-scientists, such as aristotle and erasistratus, performed various experiments on living animals. animal research played an essential role in thedevelopment of herceptin and tamoxifen, twomedications that have already saved the lives ofthousands of women who have been diagnosed withbreast cancer. even those who believe in testing on animals when it is hnecessary for vital medical research practice what isknown as "the 3 rs-reduction, refinement, andreplacement to reduce the number of animals usedfor testing. biologists believe that chimpanzees share at least 98.4percent of the same dna as humans and gorillas shareat least 97 percent, making primates a popular andlikely choice for the testing of products intended for humans

Lots of elementary school kids play sports after school. they play soccer, tennis, football, baseball, and even lacrosse. but i think that another great way to spend the afternoon is by playing a non-physical activity: chess. at our school we have a chess club that meets every week to play games and to learn about chess-related issues. chess is a wonderful game for many reasons. chess teaches students to be patient and not rush decisions. chess also teaches students how to strategize their future plans. and finally, chess teaches students the importance and necessity of sacrifice. chess can teach students just as much as any other sport. which sentence could best be added to this paragraph as a supporting detail? a) chess is not as fun as playing a sport outdoors might be. b) my father is very good at chess and plays a game with me every night. c) chess teaches students to think ahead about the consequences of their actions. d) other activities that are as fun as chess are painting, drawing, dancing, and acting.

Read the excerpt from cristina garcia’s dreaming in cuban. i don’t really want to talk about my father but i end up telling minnie how he used to take me horseback riding on our ranch, strapping me in his saddle with a leather seat belt he designed just for me. dad’s family owned casinos in cuba, and had one of the largest ranches on the island. there were beef cattle and dairy cows, horses, pigs, goats, and lambs. dad fed them molasses to fatten them, and gave the chickens corn and sorghum until they laid vermilion eggs, rich with vitamins. he took me on an overnight inspection once. we camped out under a sapodilla tree and listened to the pygmy owls with their old women’s voices. my father knew i understood more than i could say. he told me stories about cuba after columbus came. he said that the spaniards wiped out more indians with smallpox than with muskets. how does the structure of the excerpt add meaning to the passage? it includes historical information about the spaniards and indians to indicate the work is nonfiction. it describes the setting of the ranch owned by pilar’s cuban grandparents to explain family values. it uses several narrators to share their points of view about past and present life in cuba. it manipulates the chronological order of events to reveal the close relationship between pilar and her father.