Dorsal Rat Adaptation Essay

Sharks do not have skeletons, but just cartilage. Also their jaws can move independently without any of their other body parts. It allows them to have a stronger hold on their prey. Sharks have oil in their liver that allow them to eat less often. So when they eat us up, they must be really hungry. Their fins help them feel vibrations of other creatures so that they can get into position to pounce on their prey.

Adaptations are categorized in three postulates, survival of the fittest, variation, and inheritance. If an animal survives long enough to reproduce, it will pass along its genes that helped it survive to its offspring. Eventually over time, these genes will mutate and most of the species will inherit these adaptations. Charles Darwin coined the term "natural selection" in reference to artificial selection

There are several major trends that developed in the vertebrate group that has allowed the transition from aquatic to terrestrial life. Some of these trends are improved respiration, protective body covering, and more efficient ways to reproduce. The adaptations that have allowed the transition from aquatic to terrestrial life are: Jaws, lungs, jointed vertebrate limbs, water tight skin, amniotic egg for reproduction. In birds and mammals another adaptation that has evolved is that they are endothermic meaning they generate internal heat.

Homologous Structures – structures that have different functions but have a common ancestry. (ex. – arm of a human, flipper of a whale, and the wing of a bat)

I. In the wild, the deep water supports the dorsal fins upright position while collagen hardens, and in captivity, the pool water isn’t deep enough to exert the amount of pressure necessary so the fin bends.

Blacktip Reef sharks are unique organisms that appear as the way their name describes it. The sharks have black tips on its caudal and dorsal fins, as well as angled saw-like teeth and a round and small snout. Other fins that this fish has is its two pectoral fins, pelvic fin, and an anal fin. These sharks can grow to be six to seven-feet long and have white bellies and dark backs, this allows the shark to disguise itself with the obscured seafloor and the lighter ocean surface.

In the ‘NOVA LABS; The Evolution Lab,’ we found that creating a phylogenetic tree can show how different species are related to each other. A simple body part, like a vertebrate, can put species into a certain group. This means that history can prove that species do change over time because one branch represents a single species that has had a speciation. When a speciation occurs, over time, more branches appear with more species on each, which creates a tree that has more biodiversity. In ‘The Stickleback Fish - A Story of Modern Evolution’ activity, it states, “The Three-Spined Stickleback is a model organism for studies in evolution.” This means actions, such as breeding Stickleback, can help scientists see how the fish and other organisms evolve because the Stickleback fish has such a short life-span, that they can breed and get results, fast. In brief, history can prove that species do change over time because breeding can show how the Stickleback population has occurred and how different traits can be expressed in the future generations. In the ‘Comparative Anatomy’ activity, we found that when looking at two different species, you can see how they are related because both species can possess similar traits and forms. When comparing different species, you can see how different and similar two species’ bodily structures are. When looking at the bodily structures, you could see how the species has evolved over time and how some body parts stay the same. In short, history can prove that species do change over time because creating phylogenetic trees, breeding species, and comparing body parts can help scientist see who the species evolved from and how these species can continue to

Sean Carroll’s book Endless Forms Most Beautiful, attempts to explain the variety of animal forms, structures and functions by comparing them to rules that he had found. Such rules include: major “rules” for generating animal forms, species-specific encoding information, evolutionary diversity and large-scale trends in evolution. It begins by assessing the similarities between ancient and modern organisms. It notes that the structure of certain parts like vertebrates and limbs are similar in proportion and can be varied in shape and repetition. It cites animals parts like butterfly wings to show repetition of scales, snakes to show repeating vertebrae and compared a salamander to a dinosaur to express how each follow the same modular body plan.

The fins may be locked in place so that they stick outwards to defend themselves from prey. In some other species, they use these spines to inject the predator with a stinging poison. This poison is actually a protein produced by glandular cells in the epidermal tissue that covers the spines. Very few species are lucky enough to produce poison in their spines, especially since catfish have no teeth. Catfish are bottom feeders and usually capture and eat their prey by gulping or suction. They have a large mouth that can expand and some have suckermouths that allow them to attach themselves to their prey. These are all characteristics that have evolved to help them catch prey without the presence of

One of their adaptations is their skin colour, it looks similar to the colour of the ocean, making it easier to blend in with their surroundings. This is a physical and a survival adaptation. Also, the neck of the narwhal has adapted to be flexible so it can move around faster, It benefits by being able

The fins shape was changed because if the fins did warp during the flight the rocket would not fly off course or have additional drag. The fins were clipped delta fins. The fins were changed by trimming the top part of the fin so that the top side length is longer. The fins were reinforced with tape so that the fins would be more secure.The The rocket improved the distance by one

Non-historical definitions of adaptations are more useful for modern interpretations of adaptations. Gould and Vrba’s hypothesis finally addressed the origin of the adapation and claimed “an adaptation was a trait whose “historical genesis” was due to the same selective pressure as that which currently maintains the trait.” An adaptation which no longer had a selective pressure was named an

Name: Serifat Busari Date: 2/13/2017 Class: Bio 101 Professor: Alison Barrett Dolphins! Land or water? What is everyone favorite mammals? Dolphins! Dolphins are known to be one of the cutest mammals known to man. They are highly intelligent. Dolphins are mammals that are fully adapted to live in water.Dolphins, like almost all mammals, give birth to live young, and nurse them with mammary glands, though it boggles the mind to imagine nursing underwater. Just like different animals, there are varieties when it comes to dolphins. There are 32 types of dolphins. They are Bottlenose dolphin, the Killer Whale, the Common dolphin, the False Killer Whale, the Hector's dolphin, the Short-Finned Pilot Whale, the Commerson's dolphin, the Long-Finned Pilot Whale, the

When working with fins on a rocket they are there to not only help the rocket balance but also to propel it into the air. The purpose of putting fins on a rocket is to provide a stabability during flight that is and intended flight path.If a typical amateur rocket was launched without fins, it would soon begin to tumble after leaving the launcher because it doesnt have the stababily to continue its flight in the right path without it just faaling back to the ground with the force of gravity dragging it.Most rockets have some kind of fin system in the back to help stabilize the rocket. This is true for any kind of rocket, whether it is a missile, hobby rocket or space rocket. The size and the shape of the fin on the rocket affects the overall performance, speed and height that the rocket obtains.

Homologous structures are parts of the body that have a similar structure to comparative anatomy to another species. These structures are similar in function as well (Scoville, n.d.). Homology does not define a similarity between two structures, but it implies an ancestral connection (Paleontology Page for Historical