eaten by another animal or have rotted out. Apart from mollusk shells‚ other shells that can be found on beaches are those of barnacles‚ horseshoe crabs and brachiopods. Marine annelid worms in the family Serpulidae create shells made of calcareous tubes cemented onto other surfaces. The shells of sea urchins are called tests‚ and the moulted shells of crabs and lobsters are called exuviae. While most seashells are external‚ some cephalopods have internal shells. Seashells have been used by humans
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risks. Just two benefits of ocean research include new medicines and a new source for renewable energy. First and foremost‚ we should explore the ocean as it is chock full of organisms‚ many of which have great medicinal properties. The common horseshoe crab exemplifies this the best. It has a special blood that clots easily‚ and this is of great use to drug testers. Scientists can use it to find bacteria in vaccines. Previously‚ they had to use rabbits‚ which was slow‚ inefficient‚ and harmful to
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significantly thicker than in other sea turtles. This species is the largest hard-shelled turtle in the world. Loggerhead turtles have large heads (when compared to other species of marine turtles) and strong‚ muscular jaws (which help them crush prey such as crabs and lobsters). The loggerhead sea turtle is a marine mammal that grows quite large. Adults of this species weigh from 170-500 pounds (77-227 kilograms) and are nearly four feet (1.2 meters) in total length. The upper shell or carapace is widest near
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Production of Chalks out of Seashells Introduction Background of the Study More people used to collect seashells for fun and for past time. They made decorations‚ jewelries and even accessories for a doll out of it. But aside from those things‚ seashell can also made into a much useful thing. We are aware that education is the most powerful key for us to succeed. And to support this‚ we need some facilities and materials for us to make it easier and clearer. Of course‚ there is already some
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To humans‚ exploring and needing to know what is beyond the horizon is part of our nature. In July 2015‚ we watched the spacecraft‚ New Horizons‚ reach Pluto after nine years and three billion miles. As a result‚ we learned that Pluto is not just a giant ball of ice‚ but has a molten core just like Earth‚ and may have the right ingredients to possibly hold life. Although this sparked a possibility of life outside of earth; we should start exploring at our oceans first. It is part of human nature
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Characteristics of the Phylum Arthropoda The segmented bodies are arranged into regions‚ called tagmata (e.g.‚ head‚ thorax‚ abdomen). The paired appendages (e.g.‚ legs‚ antennae) are jointed. They posses a chitinous exoskeletion that must be shed during growth. They have bilateral symmetry. The nervous system is dorsal (belly) and the circulatory system is open and ventral (back). Arthropod Groups (taxa) The arthropods are divided into two large groups that exist today: The Chelicerates
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1. Did the construction of the phylogenetic tree based on the 14 living Caminalcules change the way you would group Caminalcules species in your taxonomic classification (chart)? What does this suggest about classification based on strictly of similarity versus evolutionary relationship? The phylogenetic tree was more of an evolutionary tree. It showed the evolution of the organisms and their ancestors or traits that they branched off of. The chart however just simply organizes and separates the
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that most data from these tests are inaccurate because age and gender differences play role in the outcome as well. One alternative that is currently being used is the Limulus amoebocyte lysate (LAL) test‚ which utilizes the amoebocytes from a horseshoe crab to examine the body’s responses to pyrogen (AAVS – “Testing”). It can be used instead of rabbits and other animals‚ allowing them to escape from such harsh and cruel testing
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Marine National Park in the Gulf of Kutch is situated on the southern shore of the Gulf of Kachchh in the Jamnagar District of Gujarat state‚India. In 1980‚ an area of 270 km2. from Okha to Jodiya was declared Marine Sanctuary. Later‚ in 1982‚ a core area of 110 km2 was declared Marine National Park under the provisions of the Wildlife (protection) Act‚ 1972 of India. It is the first national marine park of India. There are 42 islands on the Jamnagar coast in the Marine National Park‚ most of them
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