The effects of caffeine on Daphnia magna Lee Phan Lab Section: P0501 1000587723 1. Materials and Methods: Preparation: Clean 3-well specimen chambers were kept in ice and a cooling chamber was then prepared to be put under the microscope, by filling it with ice and a small volume of water. This was done to ensure the temperature would remain around 15 degrees Celcius, which could keep Daphnia magna efficiently cool.…
Name:Neko Science Fair Paper Daphnia Magna are small water fleas that are native to Minnesota. They are an indicator of good water quality ( Science buddies,2010 ). Daphnia Magna are small enough to be eaten by dragonflies, and are food for many small to medium sized fish. The reason that we should be paying attention to Daphnia Magna is because of pollution in our lakes. This pollution can affect a lot of actions that we do in our daily lives.…
The data collected in this experiment provided efficient evidence to support the hypothesis which was that both the allelochemicals caffeine and kava would affect the heart beats per minute in the Daphnia magna. This means that the heart rate of Daphnia magna was affected by the allelochemicals. Caffeine raised the beats per minute, while kava drastically decreased the number of heart beats in a given minute. As seen in Figure 1 kava decreased the heart rate to -46 beats per minute, while the caffeine raised the heart beats to 26 per minute. This supports the conclusion that the stimulation humans receive off of caffeine has a similar effect in Daphnia magna.…
They can weigh an excess of 500 grams, they reach lengths of up to 40 cm and tails measure 21 cm. The ears and tail are covered in hard ruff scales, the tail is usually shorter that the body. They live in communities with dominant and subordinate members. They like to nest under ground burrows and they remain in hiding for most of the day and there not social like ants. And like most animals need food,water and shelter to survive, you can find them throughout the U.S.A.…
Daphnia pulex are tiny aquatic crustaceans which have a translucent body which allows us to observe their internal organs in thorough detail. Daphnia is alleged to be a substitute of a human being in this experiment to examine the effects of chemicals on a heart of beings or other species for that matter . This will be measured by the heart rate as the heart rate is the contraction in one complete cardiac cycle. Furthermore Daphnia pulex is the most common species of water flea, an organism which can be found in almost every permanent, eutrophic water body. Generally Daphnia are freshwater organisms.…
This also helps to conserve heat when the weather is cold. They have scent glands which they use to mark their territory, and also mark their nest with urine. They communicate using a wide variety of vocal sounds. They engage in social grooming which helps improve their hygiene and health. It also helps with their colony by bonding and establishing their group identity.…
Hidradenitis Suppurativa is a chronic skin condition/disease that features lumps usually in the armpit or groin, but can appear in many places. There is no cure for this condition, but there are some treatments that may help. It usually begins after puberty and it can last for years, it can also intensify as time goes on (Overview). It is most common for Hidradenitis Suppurativa to occur where there is hair (with oil and sweat glands) and where the skin rubs together. This condition is one that can affect people in either just one area or many different areas.…
They typically have about fourteen eggs twice a year but can have anywhere from five to twenty. There eggs are about 2.5 cm long and like most snakes have a leathery shell. They like to lay their eggs in between large rocks, under sand, in an unoccupied animal…
Is Gavin liable for the act of battery when he acted with a harmful or offensive contact to Dillion’s person by first putting out his cigarette in Dillion’s coffee cup followed by taking out an unloaded shotgun and placing it on his lap causing Dillion to have a stroke resulting in him hitting his head on the concrete sidewalk suffering a serious concussion and unforeseeable and extreme brain damage? “Battery: Harmful contact an actor is subject to liability to another for battery if (a) he acts intending to cause a harmful or offensive contact with the person of the other or a third person, or an imminent apprehension of such a contact and (b) a harmful contact with the person of the other directly or indirectly results.” “Battery: Offensive…
Itch mites are also referred to as scabies mites and they are the cause of scabies. These microscopic creatures are quite irritating and can cause major itching along with a rash. A doctor will probably have to diagnose you if you do have itch mites. Itch mites are contagious and are most commonly found on people who have close contact with each other. Children are particularly prone to them, since they tend to be in closer contact with other people.…
This stink bug is native to China, Japan and those surrounding countries. It is not known how they came to be in America; although they suppose they hitched a ride in luggage and wood products. They have no natural predators here in the US and because of this their population has exploded. They have gotten to be a huge nuisance in people’s homes and the agriculture industry. American has approximately 250 native stink bug species but they are kept under control by their natural predators.…
Researchers still struggle with pinpointing how pubic lice developed. However, historical and archaeological evidence demonstrate that crab louse evolved from the similar gorilla louse, Pthirus gorillae (BioMed Central, 2009). Through genetic research on the mitochondrial genome of the chimpanzee louse, researchers found that a single mini-chromosome had fragmented into three sections in the lineage of ectoparasites, which includes head lice, body lice, and pubic lice about 3.3 million years ago (Herd, Barker, Shao, 2015). Diaz predicts that the body louse may have evolved from the head louse after man started wearing clothes without proper grooming techniques, resulting in humans being the predominant host reservoir for pubic lice (Diaz, 2006). However, humans split from gorillas approximately 7 million years ago, indicating that humans developed crab louse from the gorilla family although scientists have not yet proven how this occurred.…
Demodectic mange is caused by the demodex canis, a parasite that lives in the hair follicles of canines.” As long as the body’s immune system is functioning properly, these mites cause no harm.” Demodectic mange most commonly occurs when a canine’s immune system is immature or weak, due to young and older aged canines, which allows the mites to rapidly increase (Ward). The mites like to live on the dog but can survive for several days without the dog. If the mites are in a cool, moist area they can live for up to 22 days.…
Imagine being the first explorer of your people to sail successfully around a piece of land and find a new trade route, sounds amazing right? Well that is what Portuguese explorer Bartolomeu Dias did. He even had the chance to name the cape he sailed around. Bartolomeu Dias was born in Lisbon Portugal in the year of 1450 (“The Ages of Exploration”). He was appointed to sail to Africa to find a Christian King, but his trip was not all sunshine and smiles, he did face challenges like any normal human would, those challenges even had some even worse consequences.…
Although the statue of Augustus of Primaporta and the statue of Doryphoros bear some minor differences, the similarities between the two statues are remarkable. To the naked untrained eye these two statues might even be mistaken from the same culture. However, the statue of Augustus is from Roman culture and the statue of Doryphoros is from ancient Greek culture. These two works of art seem very similar because Roman art and culture borrowed many ideas from the Greeks and sculpting is just one of them. Augustus of Primaporta was sculpted in the early first century during the Julio-Claudians era in Musei Vaticani, Braccio Nuovo, Rome.…