QUES: The history of biodiversity during the Phanerozoic (the last 540 million years), starts with rapid growth during the Cambrian explosion—a period during which nearly every phylum of multicellular organisms first appeared. Over the next 400 million years or so, invertebrate diversity showed little overall trend, and vertebrate diversity shows an overall exponential trend. This dramatic rise in diversity was marked by periodic, massive losses of diversity classified as mass extinction events. A significant loss occurred when rainforests collapsed in the carboniferous. The worst was the Permian-Triassic extinction event, 251 million years ago. Vertebrates took 30 million years to recover from this event.

Which era included a rapid growth period?
What is the answer?
ANS: the Cambrian explosion
QUES: New Haven (local /nuː ˈheɪvən/, noo-HAY-vən), in the U.S. state of Connecticut, is the principal municipality in Greater New Haven, which had a total population of 862,477 in 2010. It is located on New Haven Harbor on the northern shore of the Long Island Sound in New Haven County, Connecticut, which in turn comprises the outer limits of the New York metropolitan area. It is the second-largest city in Connecticut (after Bridgeport), with a population of 129,779 people as of the 2010 United States Census. According to a census of 1 July 2012, by the Census Bureau, the city had a population of 130,741.

The population of the Greater New Haven in 2010?
What is the answer?
ANS: 862,477
QUES: After the American Revolutionary War, the number and proportion of free people of color increased markedly in the North and the South as slaves were freed. Most northern states abolished slavery, sometimes, like New York, in programs of gradual emancipation that took more than two decades to be completed. The last slaves in New York were not freed until 1827. In connection with the Second Great Awakening, Quaker and Methodist preachers in the South urged slaveholders to free their slaves. Revolutionary ideals led many men to free their slaves, some by deed and others by will, so that from 1782 to 1810, the percentage of free people of color rose from less than one percent to nearly 10 percent of blacks in the South.

When were the first slaves in New York freed?
What is the answer?
ANS:
unanswerable