Horseshoe Crab Research Paper

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Horseshoe crabs are marine living fossils, probably traced back to 485 million years ago. There are two horseshoe crab species found in Hong Kong. Horseshoe crabs are an ancient marine chelicerates, identified as the Class Merostomata and Order Xiphosura. The animals are identified by the having appendages around their middle of the mouth and their swimming legs at their end of their body. They are in close linkage with trilobites and arachnids which are spiders and scorpions. Amazingly, they are not closely related to the "real" crabs which are crustaceans. Four extant species of horseshoe crabs are found and have survived over the geological period. They are classified to three genera in two families under the Superfamily Limulacea. They…show more content…
Oriental Blechnum Blechnum orientale is an evergreen fern with a clump of arching fronds from 20 to 200 cm tall. It is growing from a thick rhizome that rises to a short, erect trun. It is sometimes collected by people from the wild for usage of food and a medicine. It is often used as an ornamental also. It is anthelmintic, antiviral, contraceptive and tonic. It is used in treating urinary complaints, impotence, boils in babies and older children and diarrhoea. It is believed that total sterility in women can be done by eating the new leaves of this plant each day for three complete days, then waiting a fortnight and repeating the treatment again. A paste of the young fronds can be used to treat abscesses and fungal skin infections, esp ringworm, and to stop bleeding.The plant has components of essential oil, phenolic compounds and triterpenoids. 3. Bamboo Pit…show more content…
Hemidactylus garnotii They are usually 10 to 13.5 cm long. They have sticky toe pads, vertical pupils, and lack eyelids. They are in gray to brownish color with large eyes and smooth yet not shiny skin. This species is easily identified from the similar Mediterranean gecko by the difference of their skins. They are originally inhibited in Southeast Asia. It has been transported to many tropical areas. This species can now be found throughout Florida and in Georgia. In nearly all areas, this species is related to human development, and they are seldom found far from buildings with outdoor lights. They are almost active in night time. Their toe pads are given them ability to climb walls and are often perched on walls around lights in outside, waiting to grab insects that are attracted by light. In daytime, they hide in cracks, crevices, or maybe under tree bark. This lizard is unisexual. They complete the reproduction of their species by processing parthenogenesis, which is the development of unfertilized eggs. Eggs are laid in pairs in crevices or in moist

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