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Why are whales mammals and not fish?

Millions of years ago, some land mammals wandered from the land to the ocean and evolved to live there. Other such mammals include dolphins, walruses, seals and porpoises. In the case of both dolphins and whales, the front legs turned into flippers, while the back legs became small and hardly visible. The whale is the closest living relative of the hippopotamus.

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How do you fix a bird's broken leg?

Remove the feathers around the legIf you are able to do so, pluck the feathers surrounding the broken leg. If you are not able to pluck the feathers, cut them instead.Apply layers of porous medical tapePlace a 2-inch piece of porous medical tape on top of the bruised area so that the tape is perpendicular to the leg. Do not wrap the tape around the leg. Place a second piece of the same size on the other side of the leg. Apply several more layers, and make sure the layers cover above and below the fracture.Apply layers of waterproof medical tapePlace several strips of waterproof medical tape ov..

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Where is the clitellum located on an earthworm?

When two worms mate, they lie next to each other, head to tail. The clitella line up with one another and the two worms exchange sperm. The number of segments making up the clitellum differ among species and can be an identifying characteristic.\nThe earthworm lays eggs and then deposits the sperm it retained from its mate into the cocoon structure. The earthworm then withdraws, leaving the cocoon in the soil.

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How many litters can a dog have per year?

Age tends to play a role in a dog's estrus cycle. Many dogs do not experience regular estrus cycles for the first couple of years upon reaching sexual maturity. For example, it is normal for a young dog to only have one heat cycle a year.\nNot all dog breeds have regular heat cycles. Smaller dog breeds can have a heat cycle three times a year, and certain larger breeds may have a heat cycle only once a year. A dog cannot get pregnant between heat cycles. However, a dog can become pregnant during a "silent" heat. Silent heats are simply heat cycles that go undetected.\nTypically, it is not..

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How do you care for a glass tree frog?

Set up a glass tankTree frogs do best in glass tanks that are at least 10 to 15 gallons in size. If you plan on purchasing more than one frog, add 5 to 10 gallons to the size of the tank for each additional frog depending on the size of the frog. Place the tank away from windows because direct sunlight encourages the growth of algae. Add substrate lining to the tank as well as plastic or live plants and large branches for the frogs to climb on. Also include a water bowl large enough for your frog to sit in.Heat and light the tank properlyUse a heating pad placed under the tank to keep the tank..

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What are some tips for finding free puppies in Michigan?

Online classified advertising website Craigslist.org features a section for advertising pets under the Community heading. ClassifedAds.com also lists pets who are free to good homes. Local newspaper classified sections, either in the paper edition or online, often feature free puppy ads. Check bulletin boards at vet clinics, pet stores and feed stores for fliers advertising free puppies. Ask friends and relatives if they know of puppies in need of homes.\nAnimal shelters and rescues generally charge an adoption fee for puppies, but under certain circumstances, they may waive the fee. For examp..

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How do you build an indoor monkey cage?

Build the cageIn order to build the cage, make sure that you have ample space in the indoor area, but it should also have access to air, branches and other play things that a young monkey normally needs. Install metal poles with fine wire mesh for the monkey to play on. The area beneath the cage can be a simple cement floor, or it can also be an area of dry mud or even grass so that the monkey feels at home in the cage as well.Include play thingsPlace nontoxic plants and play things like rope, swings and heavy branches in the cage to keep the monkey occupied and playful.Install a two-door secu..

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What are some tips for housebreaking puppies?

Establishing a routine includes taking your puppy outside often and picking a bathroom spot outside. Puppies should be taken outside around every two hours and immediately after she wakes up, eats and after all playtime. Picking a spot helps your pet become familiar with the process. Be sure to use a word or phrase that the puppy can understand and relate to the experience, such as "potty time" or something similar so that you can eventually use that right before it's time to go outside. Playtime should be saved until after the pet has eliminated.\nIt is also important to reward your pupp..

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Where did dinosaurs come from?

Although dinosaurs are now extinct, there are many living examples of the dinosaur through its descendants in the bird kingdom. Alligators and other reptiles are also descendants of dinosaurs, but they are later descendants and evolved from other animals that evolved from dinosaurs. It is believed that birds evolved from dinosaurs directly. There are many similarities between dinosaurs and birds including hollow bones, walking upright and closely related skulls.When the dinosaurs were alive, people were not yet living. Humans came into existence approximately 2.5 million years ago, which is ap..

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Where do reindeer live?

Reindeer have widespread populations, although some subspecies are rarer than others. Female reindeer in most populations grow antlers, while male antlers are often larger. As ruminants, reindeer are herbivorous and subsist on a diet of plants and lichens native to cold climates. In extreme conditions, reindeer are known to feed on small rodents, fish and eggs. Male reindeer usually weigh between 350 and 400 pounds, and females typically grow no larger than 260 pounds.

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