1 It may be hard to believe. 2 But light was once a rare and inviolate commodity. 3 Our ancestors invented willful ways to harness natural light; burning lumps of tallow or animal fat, capturing fireflies in glass jars, and even threading wicks down the throats of a bird called the storm petrel.4 Most of these methods were messy, inconvenient, and costly. 5 So it was fortunate when kerosene became popular. 6 Whale oil was another way to get light, but whaling was a dangerous and deadly occupation. 7 The innovation of the electric light bulb represented another huge leap in convenience and cost-effectiveness. 8 While light is not scarce today; in fact, we often have the opposite problem. 9 Light pollution, or excessive artificial light, which can keep city denizens from ever seeing the stars or appreciating true darkness.

How should Sentence 8 be rewritten?

1 It may be hard to believe. 2 But light was once a rare and inviolate commodity. 3 Our ancestors invented willful ways to harness natural light; burning lumps of tallow or animal fat, capturing fireflies in glass jars, and even threading wicks down the throats of a bird called the storm petrel.4 Most of these methods were messy, inconvenient, and costly. 5 So it was fortunate when kerosene became popular. 6 Whale oil was another way to get light, but whaling was a dangerous and deadly occupation. 7 The innovation of the electric light bulb represented another huge leap in convenience and cost-effectiveness. 8 While light is not scarce today; in fact, we often have the opposite problem. 9 Light pollution, or excessive artificial light, which can keep city denizens from ever seeing the stars or appreciating true darkness.

In Sentence 3, what punctuation mark should replace the semicolon?

1 The word wig itself comes from the English word periwig and can demote a variety of styles, materials, and colors. 2 Have you ever wondered what goes into making a wig? 3 Historically wigs have served a variety of functions and took a number of forms. 4 Wigs have been used as fashion accessories, costume components, and to disguise baldness. 5 These days, wigs are most commonly made from synthetic materials, real human hair, or hair from animals, such as goats and yaks.

How should Sentence 4 be rewritten?

1 The word wig itself comes from the English word periwig and can demote a variety of styles, materials, and colors. 2 Have you ever wondered what goes into making a wig? 3 Historically wigs have served a variety of functions and took a number of forms. 4 Wigs have been used as fashion accessories, costume components, and to disguise baldness. 5 These days, wigs are most commonly made from synthetic materials, real human hair, or hair from animals, such as goats and yaks.

How should Sentence 3 be rewritten?

1 Today, different methods are adopted to strive off these threats to biological diversity. 2 By now, the occurrence of invasive species is a common place problem. 3 It occurs when a non native species of plant or animal is introduced into a new environment. 4 Invasive species cause problems, such as kudzu, Asian carp, and zebra mussels. 5 Habitats can be destroyed and human economies can be damaged by the invidious effects of species that are inoculated or even charming pets in other ecosystems. 6 For example, rabbits in Australia. 7 They were introduced in the 1780s by British penal colony ships and became widespread after an 1859 outbreak, destroying millions of dollars worth of crops. 8 Pheromone traps can lure in insect pests and genetic modification can cause invasive carp to produce only male offspring, limiting their reproduction. 9 Given our widespread global commerce and travel, however, it may be impossible to foresight all damage done by species that end up somewhere they don’t belong.

How should Sentence 4 be rewritten?

1 As anyone who has tried it can tell you, Filipino food is an exciting intriguing blend of flavors. 2 Due to interaction with various nations and cultures, it’s cuisine is marked by influences from Austronesia, Spain, China, Malaysia, and the United States. 3 Some typical dishes including pancit, longganisa, lumpia, kare-kare, pinakbet, sinigang, and adobo. 4 For example, one could find everything from Spanish paella and Chinese spring rolls (locally called lumpia) if you walked into a Filipino restaurant.

5 Another important compound of Filipino cuisine is street food. 6 These street foods include many fried foods, such as bananas, plantains, dumplings, squid balls, battered quail eggs, and fruit or vegetable spring rolls.7 Taho, a warm street food, is composed of bean curd, a caramel syrup or arnibal, and tapioca pearls.8 Don’t forget dessert! 9 With such a variety of flavors, textures, and cooking styles, there’s certainly to be something for every gourmand.

How should Sentence 3 be rewritten?

1 While many people feel strongly about the genetic modification of foods. 2 Most do not understand the full nature of genetically modified (GM) plants and animals. 3 For example, did you even know that GM was the abbreviation for genetically modified? 4 Genetic modification is defined as the artificial manipulation of a specie’s DNA usually for the purpose of improving crop yield, resistance to disease, or nutritive value. 5 And did you know it has been going on for millennia, because ancient farmers were selectively breeding foods to provide better flavor, produce smaller seeds, or withstand drought and flooding?

6 Today, however, having more sophisticated tools allow scientists to transfer genes from one organism with another, this purposely provokes better pest resistance and other desirable characteristics. 7 Opponents of genetic modification argue that the DNA modifications are unstable, undesirable, and unhealthy for the environment. 8 Additionally, some are also arguing that consuming GM foods is unsafe for humans, despite much scientific evidence to the contrary.

How should Sentence 5 be rewritten?

1 While many people feel strongly about the genetic modification of foods. 2 Most do not understand the full nature of genetically modified (GM) plants and animals. 3 For example, did you even know that GM was the abbreviation for genetically modified? 4 Genetic modification is defined as the artificial manipulation of a specie’s DNA usually for the purpose of improving crop yield, resistance to disease, or nutritive value. 5 And did you know it has been going on for millennia, because ancient farmers were selectively breeding foods to provide better flavor, produce smaller seeds, or withstand drought and flooding?

6 Today, however, having more sophisticated tools allow scientists to transfer genes from one organism with another, this purposely provokes better pest resistance and other desirable characteristics. 7 Opponents of genetic modification argue that the DNA modifications are unstable, undesirable, and unhealthy for the environment. 8 Additionally, some are also arguing that consuming GM foods is unsafe for humans, despite much scientific evidence to the contrary.

Which sentence contains a comma splice?

1 While many people feel strongly about the genetic modification of foods. 2 Most do not understand the full nature of genetically modified (GM) plants and animals. 3 For example, did you even know that GM was the abbreviation for genetically modified? 4 Genetic modification is defined as the artificial manipulation of a specie’s DNA usually for the purpose of improving crop yield, resistance to disease, or nutritive value. 5 And did you know it has been going on for millennia, because ancient farmers were selectively breeding foods to provide better flavor, produce smaller seeds, or withstand drought and flooding?

6 Today, however, having more sophisticated tools allow scientists to transfer genes from one organism with another, this purposely provokes better pest resistance and other desirable characteristics. 7 Opponents of genetic modification argue that the DNA modifications are unstable, undesirable, and unhealthy for the environment. 8 Additionally, some are also arguing that consuming GM foods is unsafe for humans, despite much scientific evidence to the contrary.

How should Sentence 4 be rewritten?

1 The lost-wax casting method may sound cryptic, but its really a fairly simple and comprehendible process. 2 It is also known as investment or precision casting. 3 It involves twelve steps in that an artist makes an original wax model; creates rubber and plaster molds from the model; fills the molds with wax; coats the new wax models with a ceramic material; and fires the wax-ceramic mixture into a kiln so that the outer layer becomes a reusable mold and the inner wax melts away. 4 Despite involves technical jingo such as spruing, metal-chasing, and burnout, it is a very versant process that can be applied to everything from jewelry making and sculpture, automobile and gun manufacturing.

5 Lost-wax has been used by sculptors from ancient Greece all the way to modern day Germany. 6 Lost-wax has even been applied to dentistry, it is most frequently used to make gold crowns and inlays.7 Why not give it a try? 

Which sentence contains a comma splice?