Thursday, March 19, 2020

Free Essays on Huckleberry Finn

Title: The Adventures of Huckleberry Finn Author: Samuel Clemens (Mark Twain) Author Works: The Adventures of Tom Sawyer, The Prince and the Pauper Mark Twain: Mark Twain is one of America’s best authors and the most famous. Mark twain was born in 1835 on November 30 in Florida, Missouri. Florida and Hannibal, Missouri is where he got his ideas for Huck Finn and Tom Sawyer. Twain was an avid traveler he went to many places in his time; all aver the world. To write he observed people doing there everyday lives. He got many awards from colleges universities and others; He died On April 21, 1910. Illustrator: none Setting: Some of the book is set in St. Petersburg, Missouri. But most of the book is set in and on the Mississippi River. The City is about 80 miles away from St. Louis. But The Book is in Eighteenth Century America. Characterization: Huck Finn: the main Character of the book, son of the town drunk. He is 12 yrs old. Clever and knows a lot about life. Jim: the run away slave of Miss Watson helps Huck gain freedom. Travels with him. Widow Douglas: Huck’s guardian who adopts him and wants to civilize him. Takes care of two other kids. Pap: Huck’s father when he comes back to town when he learns that his son has become rich. Tom Sawyer: a friend of Huck who is about the same age. Duke and Dauphin: two friends who go around tricking people and getting their money, they also join Huck and Jim on the raft. Plot: Huck and tom have earlier found a hidden treasure they are allowed to keep the treasure. His father comes back for his money and to take it all. He feels that it is rightfully his and tries to catch him many times. One day he waits for him catches him and they have a short fight. When Huck is locked in the cabin down river his father beats him. After a couple of months pass he runs away and His father thinks that he is dead because of the pig blood Huck left behind. Aft... Free Essays on Huckleberry Finn Free Essays on Huckleberry Finn Title: The Adventures of Huckleberry Finn Author: Samuel Clemens (Mark Twain) Author Works: The Adventures of Tom Sawyer, The Prince and the Pauper Mark Twain: Mark Twain is one of America’s best authors and the most famous. Mark twain was born in 1835 on November 30 in Florida, Missouri. Florida and Hannibal, Missouri is where he got his ideas for Huck Finn and Tom Sawyer. Twain was an avid traveler he went to many places in his time; all aver the world. To write he observed people doing there everyday lives. He got many awards from colleges universities and others; He died On April 21, 1910. Illustrator: none Setting: Some of the book is set in St. Petersburg, Missouri. But most of the book is set in and on the Mississippi River. The City is about 80 miles away from St. Louis. But The Book is in Eighteenth Century America. Characterization: Huck Finn: the main Character of the book, son of the town drunk. He is 12 yrs old. Clever and knows a lot about life. Jim: the run away slave of Miss Watson helps Huck gain freedom. Travels with him. Widow Douglas: Huck’s guardian who adopts him and wants to civilize him. Takes care of two other kids. Pap: Huck’s father when he comes back to town when he learns that his son has become rich. Tom Sawyer: a friend of Huck who is about the same age. Duke and Dauphin: two friends who go around tricking people and getting their money, they also join Huck and Jim on the raft. Plot: Huck and tom have earlier found a hidden treasure they are allowed to keep the treasure. His father comes back for his money and to take it all. He feels that it is rightfully his and tries to catch him many times. One day he waits for him catches him and they have a short fight. When Huck is locked in the cabin down river his father beats him. After a couple of months pass he runs away and His father thinks that he is dead because of the pig blood Huck left behind. Aft...

Tuesday, March 3, 2020

Aphids, Family Aphididae

Aphids, Family Aphididae Plant-sucking aphids are the bane of a gardeners existence. Come spring, aphids appear as if by magic and begin draining the life out of tender plants. Their ability to reproduce, both sexually and asexually, is prolific. Description Aphid bodies are soft and pear-shaped. Though most often green or yellow, aphids come in a variety of colors, from red to black. Few aphids measure more than a couple of millimeters. An individual aphid would be difficult to spot, but since aphids feed in groups, their presence is usually noticeable. Up close, aphids resemble little muscle cars with a pair of tailpipes. Entomologists believe these abdominal appendages, called cornicles, secrete waxy lipids or alarm pheromones when the aphid senses a threat. The presence of cornicles is a common characteristic of all aphids. Antennae may have five or six segments, with the final segment ending in a thin flagellum. At their other end, aphids possess a cauda, a short, tail-like appendage centered between the cornicles. Aphids usually lack wings, though certain environmental conditions may cause winged forms to develop. Classification Kingdom - AnimaliaPhylum - ArthropodaClass – InsectaOrder – HemipteraFamily - Aphididae Diet Aphids feed on plant phloem tissues, sucking the sugary liquids from the host plants vascular system. Reaching the phloem is no easy task. Aphids feed using a straw-like proboscis that contains thin, delicate stylets for piercing plant tissues. In order to protect the stylets from damage, the aphid secretes a special fluid from them, which hardens into a protective sheath. Only then can the aphid begin feeding. Aphids need nitrogen, but phloem juices contain mostly sugars. To get adequate nutrition, aphids must consume an enormous quantity of phloem liquids. They excrete the excess sugars in the form of honeydew, a sweet residue left behind on plant surfaces. Other insects, such as ants and wasps, follow behind the aphids, licking up the honeydew. Life Cycle The aphid life cycle is somewhat complex. Aphids usually reproduce asexually, with aphid mothers giving live birth to their young. Sexual reproduction occurs just once per year, if at all. Just before winter, sexual females mate with males and then lay eggs on a perennial plant. The eggs overwinter. In warm climates or in greenhouses, sexual reproduction rarely occurs. Special Adaptations and Defenses Aphids are tiny, slow-moving, and soft-bodied – in other words, easy targets. Theyre far from defenseless, however. Aphids use both fight and flight, and everything in between, to protect themselves. If a predator or parasitoid approaches an aphid, it can react in a number of ways. Aphids will literally kick their attackers, with some serious aggression. In other cases, the aphid may just walk away, hoping to elude the trouble. Sometimes, the aphid does a stop, drop, and roll, and simply falls to the ground. Some aphid species employ soldier aphids to stand guard. Aphids also arm themselves with defensive weaponry. When a pursuing predator attempts to take a bite from behind, they can excrete a waxy lipid from their cornicles to fill the attackers mouth. Alarm pheromones broadcast the threat to other aphids or may summon protection from bodyguards of other species. If a lady beetle attempts to feed on it, a cabbage aphid will mix toxic chemicals within its abdomen to bomb the offender. Aphids also use bodyguard ants, which they pay with sweet honeydew excretions. Range and Distribution Both abundant and diverse, aphids mainly inhabit temperate zones. Aphid species number over 4,000 worldwide, with about 1,350 species in North America alone.