Bear and Salmon Anne Phoebe Munnera Claudia

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Bear and Salmon Anne Phoebe Munnera Claudia

#1- heat gets biggerBecause he need to be able to get more oxygen to fuel his greater muscles and keep oxygen going to allow him to run faster and hunt attack more prey.#2- Blood vesselsThe blood vessels will be closer to the surface but also be able to trap in more heat to keep the blood warm but then be able to open up to allow the blood to cool off faster when it pases by the surface to allow the bear to keep cool in the cold weather with its extremely effective insulation system which it will have acquired, two types of hair structure, Thick layer of blubber as well as black skin, much like the polar bears.#3-blubber and nerve near arteries and veinsThey could develop some blubber near the arteries and veins as well as capillaries to keep the blood warm and flowing in the cold and help them not need hibernation in the cold, the nerves could also pump as reflex with the heart to keep the blood flowing at a fast and steady rate to speed up the rate the oxygen and waste is carried through the bloodstream to its destination point.

#1- gains amphibian circulatory systemBecause to become warm blooded to survive the cooler waters he had to be able to become a mammal so he can be warm blooded to survive the cold waters. Although 2 million years is not enough for it to go from a two section heart to four by 2 million year he would have only reach the checkpoint on the way of becoming an amphibian with 3 parts of his heart.#2-glycoprotein in the blood streamThe fish starts to produce glycoprotein. The fish can have he glycoprotein flow through its blood stream to be delivered around the body to keep it from freezing up as well as stopping the blood from freezing up.3# There is more hemoglobin on the red blood cells This is so more oxygen can get around the body faster so the fish is able to give more fuel to its body allowing it to work harder and for longer to find the scarce food in it’s system

Adaptation 1 Bigger Heart Adaptation 2 Salmon have some blubber by their gills to keep warm and function well to keep oxygen coming.Adaptation 3 The evolution of bears begins in the early Miocene era, approximately 20 mya (million years ago), when the first bear type animal named Ursavus elmensis evolved from a dog-like ancestor (Hitchcock, 2004). Fossil records from U. elmensis show carnassial teeth with larger molars for more chewing area, a trait common to present day bears. Another early bear in the lineage leading to grizzlies is Ursus minimus of the cave line bears, which lived in the Pliocene era, about 10 mya. The cave line bears persisted until the most recent ice age 10,000 years ago but then became extinct. However, roughly 1.5 mya a new lineage of bears diverged from the cave bear line. These bears, which were most similar to Ursus etruscus of the cave bear line, were the common ancestors of the brown bears, Ursus arctos, and the black bears, Ursus americanus. The closest relative of the brown bear is the polar bear, which diverged from U. arctos about 300,000 years ago. Brown bears have diverged into a large number of subspecies, one of which being the grizzly bear common to North America.

Adaptation 1 Harder BreathesGrizzly bears would have longer breathes because when they run in their normal environment Adaptation 2 Bigger Heart

The bear would have bigger arm and leg muscles. They would need these because there would be less plant life and to survive they need to be more carnevourus and chase animals and therefor need to be faster. Also, the bear would become leaner, the muscles more built for speed than only just strength. This is again for the bear to have a better chance at survival. Lastly, the smooth muscle inside the stomach would get stronger because he is now more carnevourous and the acid would need to be stronger to digest the bones and meat.

The salmon would get more white muscle so that it can have more speed for a longer time because there are less safe places since those have frozen over. There is going to be more predators and they need to outswim them. There would also need to be more red muscle becasue their rivers are frozen up and they need to keep going for a longer time. Lastly, there would be more muscles since the fish would get bigger to avoid more predators, so the rows of muscle extend farther back and their would be more.

Bigger and Sharper TeethThe teeth should become larger and bigger so then it could become a carnivore and hunt larger prey. So the fish can growAbdominal VertebraeThe vertebrae will grow on the top of the fish so the fish can swim faster and the fish will become more arrow dynamic. It can also get away from predators.Thinner BonesIf the bones become thinner in the salmon then they will be more flexible so they could swim faster.

Longer BonesThe bear is a carnivore so then the bear is going to have to move and run faster so it’s longer legs will make it run faster.Stronger BonesBears hibernate in the winter so they will have to have stronger bones to support the bear’s weight after sleeping for a longer period of time.IschiumThis bone is going to have come up in the arms so then it is easier to run and the bear can go faster to hunt larger animals.

Ciruclatory System

Respiratory System

Skeletal System

Muscle System






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