Arctic Circle

• Polar bears and brown bears can produce a hybrid offspring • Polar bears evolved from brown bears • The timing of when polar bears first appeared is vital because it determines when they have experienced warm periods with little sea ice historically • Mitochondrial DNA (mtDNA) – relationships based on differences in a group of genes • The polar bear genome discovered alterations in genes related to the development of the heart, cardiovascular function and lipid metabolism – this is why…

The Polar Regions are too cold to support a variety of life. However, scientists have discovered life forms that thrive in this cold environment, and they term the polar oceans as important in maintaining a balance on earth. The amount of water frozen in these regions can be destructive if melted nod released to the warm waters. The McMurdo station is a destination for many scientists to conduct their studies on the waters and the life forms that survive in the cold environment (Nold, 2002).…

Synopsis Professor Cindy D’On Jones seeked to find out how different approaches to teaching kindergarten students various writing skills affected how they acquired those skills. Instead of the usual one independent variable experiment, two different teaching styles were compared independently of each other to the controlled, “normal” teaching style. Ultimately, the researchers found that the differing teaching styles did not affect the improvement of students’ scores on the foundational writing…

Reflection of Heather’s Reading/Writing Heather is in the fourth grade. Her educational background, in earlier years, had small gaps. She lived in an environment that was unstable and was removed from her home into foster care. Heather and her two brothers were adopted by an aunt and uncle two years ago. Her aunt is a retired teacher and has helped to stabilize her education. In analyzing Heather’s reading interview, I find that Heather likes to read. She has already read 20 books this…

Alzheimer’s disease (AD) is a devastating neurodegenerative disease characterized by the accumulation of amyloid beta (Aβ) peptides within the brain. The buildup of amyloid plaques in the AD brain disrupts synaptic functions, leading to progressive neuronal degeneration, culminating in the death of the AD patient within ten years of diagnosis. As of writing this letter, no treatment exists that is capable of impeding AD progression. However, Dr. Carter’s hypothesis that increasing apolipoprotein…

nationalgeographic.com nationalgeographic.com We already brought you part one of our list of 40 things you didn't know about Canada, and now we're back with part two! Check out 10 more fascinating facts about our Northern neighbor that you definitely (probably) didn't know below, and stay tuned for parts three and four, coming soon! Number Thirty: It Has Overpasses Built Exclusively for Animals. It's true! There are highways in Canada's Banff National Park that include overpasses built for…

Whoever said diamonds were a girl’s best friend never owned a dog! The Siberian Husky is an extraordinary dog breed. In order for this breed of dog to exist there must have been reproduction among other animals to create this breed. The Siberian Husky is said to have been originated from Chukchi, which is a tribe of Siberian nomads (Siberian Husky, 2013). The Chukchi tribe created huskies for their own existence. Chukchi lived in hostile climates in the word were temperatures reached as low as…

Cross breeding plays an important part in the future of endangered animals. In the case of polar bears it may lead more quickly to the extinction of them. Within the past 10 years scientist have found several bears sharing DNA, in this case the two bears sharing the DNA are the polar bears and the grizzly bear. The earth has been heating up which means that the polar bears are getting pushed out of there land space, and are even starting to die off. The polar bears have to expand into the…

They have white-yellow fur that help them camouflage into the snow and ice in order to help them catch their prey. Polar bears live in the Arctic region. They live on the ice, the coast and islands of the Arctic region. I think climate change and overhunting are most likely to influence the future of the polar bears. I believe climate change is a factor because it causes the loss of ice habitat for the polar bears. This is…

Another vertebrate that lives in the tundra is the polar bear. Polar bears can be found in northern areas of Canada, Alaska, Russia, and Norway. They are also located in various parts of Greenland. Polar bears are among the largest land mammals on earth. Males can weigh between 700-1400 pounds and stand between 8-10 feet tall. Females only weigh about 350-700 pounds. Polar bears appear to have a white coat, however, their hairs are really translucent and clear. The skin of the polar bear is…