QUES: Unlike animals, many plant cells, particularly those of the parenchyma, do not terminally differentiate, remaining totipotent with the ability to give rise to a new individual plant. Exceptions include highly lignified cells, the sclerenchyma and xylem which are dead at maturity, and the phloem sieve tubes which lack nuclei. While plants use many of the same epigenetic mechanisms as animals, such as chromatin remodeling, an alternative hypothesis is that plants set their gene expression patterns using positional information from the environment and surrounding cells to determine their developmental fate.
Why are plants able to stop and start dividing cells?

ANS: information from the environment

QUES: Valleys and plains are found along the coastline and rivers. The north of the province lies just south of the Yangtze Delta, and consists of plains around the cities of Hangzhou, Jiaxing, and Huzhou, where the Grand Canal of China enters from the northern border to end at Hangzhou. Another relatively flat area is found along the Qu River around the cities of Quzhou and Jinhua. Major rivers include the Qiangtang and Ou Rivers. Most rivers carve out valleys in the highlands, with plenty of rapids and other features associated with such topography. Well-known lakes include the West Lake of Hangzhou and the South Lake of Jiaxing.
 What does the north of the province lie just north of?

ANS: unanswerable

QUES: Archaeology confirms the widespread use of binding spells (defixiones), magical papyri and so-called "voodoo dolls" from a very early era. Around 250 defixiones have been recovered just from Roman Britain, in both urban and rural settings. Some seek straightforward, usually gruesome revenge, often for a lover's offense or rejection. Others appeal for divine redress of wrongs, in terms familiar to any Roman magistrate, and promise a portion of the value (usually small) of lost or stolen property in return for its restoration. None of these defixiones seem produced by, or on behalf of the elite, who had more immediate recourse to human law and justice. Similar traditions existed throughout the empire, persisting until around the 7th century AD, well into the Christian era.
What was the term for binding spells in the Roman world?

ANS: defixiones

QUES: These immigrants were largely responsible for the first general strike in North America in 1835, in which workers in the city won the ten-hour workday. The city was a destination for thousands of Irish immigrants fleeing the Great Famine in the 1840s; housing for them was developed south of South Street, and was later occupied by succeeding immigrants. They established a network of Catholic churches and schools, and dominated the Catholic clergy for decades. Anti-Irish, anti-Catholic Nativist riots had erupted in Philadelphia in 1844. In the latter half of the century, immigrants from Russia, Eastern Europe and Italy; and African Americans from the southern U.S. settled in the city. Between 1880 and 1930, the African-American population of Philadelphia increased from 31,699 to 219,559. Twentieth-century black newcomers were part of the Great Migration out of the rural South to northern and midwestern industrial cities.
Who carried out the first strike in North America?

ANS:
immigrants