There is a one in twelve-thousand chance of finding a pearl in an oyster meaning that pearls are a very rare object, right? But what makes a pearl special? Well a pearl is formed when a foreign object enters a clam, mussel, or oyster and the shell responds by forming layers around the particle eventually creating a pearl. So if a real life pearl is made of rare layers, then what layers is Pearl Prynne made of? In The Scarlet Letter, Hester’s child Pearl represents the sin of the letter, resilience
septum, which allows air to travel in the pharynx. There are three parts to the pharynx, the nasopharynx, the oropharynx, and the oropharynx. The nasoph... ... middle of paper ... ...ory system perform actions that are similar in both mammals and molluscs, thus resulting in the same end product. Respiration is crucial in the survival of all animals, relating the Phylum Chordata, Class Mammalia to the Phylum Mollusca, on a parallel level. Although each animal in these taxonomic groups have varied
been vital to people for a huge number of years. They have been, and still are, utilized as sustenance, devices, enrichments, cash, melodic instruments and that's only the tip of the iceberg. A couple of them are recorded beneath. Economical Role of Molluscs: 1) Source of Food: A few mollusks, for example, shellfish and scallops, are vital sustenance sources. Squids,
them from the water (Oyster…2014:[sp]). Since natural pearls take certain time to develop in oysters, people figured out a way in which pearls can be produced named a human cultivation process. A process in which certain nucleus are injected into molluscs for pearls to be produced, but for this process to happen the aqua life has to be disturbed (Dawson 2011:47). The way pearls are removed for human cultivation process is environmentally harmful regarding that “95% of oysters are farmed and harvested”
The stages in a typical jelly life history are adult, gametes, planula, scyphistoma , strobila , and ephyra. Moon Jellies reproduce sexually and asexually. The adult Moon Jelly reproduces sexually by releasing eggs, and then the sperm over the eggs. Jellyfish can be either male or female so one jellyfish can reproduce entirely on its own (gametes). Once fertilized the eggs develop into small, ciliated planula larvae. The larvae look for a safe protected place to nest and to continue to grow safely
OCTOPUSES: WHAT DO THEY DO? Octopuses, octopi or octopodes are one of the most interesting sea creatures in the world. They have been living on earth since 296 million years ago during the carboniferous period, based on the oldest octopus fossil found. Octopuses along with cuttlefishes and squids are known to be cephalopods which are characterized by a prominent head, a set of arms or tentacles, and 'mirror image’ body symmetry. Since they are invertebrates, they do not have a backbone which makes
Clownfish, Amphiprion sp. Introduction: Clownfish includes a group of species that belongs to the family Pomacentridae. These species whether caught from the wild or bred in captivity make up about 40% of the global marine ornamental trade. They are about 30 known species which are native to warmer waters and are found around tropical coral reefs; most of which live in the shallow waters of the Indian Ocean, the Red Sea, and the western Pacific. Description: These fishes are characterized by their
The eye is an extremely diverse organ, ranging in complexity across and within animal phyla. Here, a comparative approach is taken to outlining the diversity of the eye forms within vertebrates and invertebrates. The eye morphology of a variety of organisms was examined. Eye function, and placement on the body was also considered. Here, variation in eye form is discussed in relation to the environment the organism is adapted to. It is shown that an organisms eye morphology functions optimally for
Echinoderms (scientific name Echinodermata) are a major group of only marine animals. The name comes from the Greek word for "spiny skin". There are about 7,000 species found usually on the sea floor in every marine habitat from the intertidal zone to the ocean depths (Marine Education Society of Australasia 1999-2015). They occur in various habitats from the intertidal zone down to the bottom of the deep sea trenches and from sand to rubble to coral reefs and in cold and tropical seas. Some echinoderms
common sniper are very common. Amphibians and reptiles include the wood frog, long-toed salamander, and rubber boa. Fish species that live in Montane Cordillera include, lake whitefish, chiselmouth, leopard dace and redside shiner. In addition, molluscs such as pig-toe, western-river pearl mussel, arctic-alpine fingernail clam are common. Finally, there
back to health we risk collapsing a unique and truly special ecosystem. The reef has been recognized as a World Heritage Site due to its remarkably unparalleled biodiversity. With 600 types of corals, more than 100 kinds of jellyfish, thousands of molluscs and fish species, over 100 forms of rays and sharks, and approximately 3 dozen sorts of whales and dolphins the reef is a complex living breathing machine with millions of moving parts that make it's existence possible. If this habitat is continually
growth, maintaining the reef's structure and providing a foundation for coral polyps to anchor and grow. The Great Barrier Reef has the largest collection of coral reefs and consists of over 400 types of coral, 1500 species of fish, and 4000 types of mollusc. It’s also the habitat for dozens of species of sharks, rays and mammals like the dugong and the green sea turtle. The main vegetation includes over 300,000 hectares of sea grasses and various types of algae. Human activity has significantly altered
uiuc.edu/cwe/wwwtest/mussel/Pages/introduction.html Vermont's Freshwater Mussels Uniqueness and Diversity, Now Under Siege. The Nature Conservancy of Vermont. http://tnc.org/searchtnc.html (second listing under search for mollusk). West Coast Mollusc Culture: A present and future perspective proceedings of a California Sea Grant Workshop in cooperation with the Pacific Sea Grant College Program. edited by Rosemary Amidei. La Jolla, CA California Sea Grant College Program, Institute of Maine Resources
The purpose of this essay is to explore some of the mechanisms involved in the seed dispersal in plants. Plants are some of the most ancient biological organisms on the planet, and over the millennia they have adapted to utilise both the natural resources of the earth and the animals on it in order to spread their seeds. Without a variety of processes plants would be restricted to localised geographical areas, and this would limit their populations. This essay discusses some of the major ways that
home of hundreds of bird species, bears, foxes, and multiple other animals. The 200 million gallons of oil spilled into the Gulf is proof that oil drilling is a serious threat to the environment. Thousands of animal species, including fish, birds, molluscs, reptiles, and mammals. each of these species homes have now been contaminated with oil. (“More Oil Drilling Not Worth the Risk”) which will stick to their skin and corrode on them. Alaska will have the same fatality that Mexico suffered maybe even
important ecosystem processes will be examined. Seagrass meadows are highly productive and are ideal for nurseries habitats for small fish, providing a relatively safe habitat for them to escape bigger predators and to be raised in. Clams and other molluscs are also found in the seagrass meadows. The abundance of coastal regio... ... middle of paper ... ...of increased anthropogenic factors and climate change. The true extent of their global decline is not widely known and there is at present a
In the US, heart attacks kill more people than any other single cause. Many of the deaths are caused by electrical disturbances in a damaged heart that cause it to fibrillate (Pool). Despite current overwhelming interest in the operations of the human heart, for most of history the human heart has been regarded as a "forbidden organ too delicate to tamper with" (NOVA). In fact, it might have remained so, were it not for World War II where military doctors, faced with massive numbers of injuries ushered
There are all kinds of penguins, three popular ones are Gentoo, Adelie and Emperor. The first penguin I’m going to tell you about is the gentoo penguin they are pretty cool looking penguins, not very big. They only grow to about 30 inches tall, about 2 and a half ruler sticks. They only weigh about 12 pounds, Just a bit heavier than a newborn baby. These penguins live in large colonies with other gentoo penguins. They dive deep for the food, they eat other small fish and krill. They don’t need
Over the course of our lives, there are times where we are at a high point, where our lives are full of happiness and there is nothing for us to worry about. However, we often come to sit back and realize that our lives might not be exactly how we imagine it. There are problems and obstacles that we must choose to overcome. With the rate society is evolving at, we miss out on the little things like friends and family that makes our lives that much more special. Life can be filled with bliss no matter
It is usually around 7 centimeters in length, 6 centimeters in height and 2 centimeters in width. They are hermaphroditic and “lay approximately 25-40 eggs per year.” (Chhun) This snail is best known for its taste for the flesh of other snail and mollusc species, and has even been known to engage in cannibalistic behavior. This snail possess a set elongated lips that resemble tentacles called “oral lappets” which are used to track prey through the taste of the slime trails left behind by other snails