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.
Rene Ismail McKenna - C 9th Grade Biology PBA American Lobster - Homarus americanus Ecosystem/Ecology of Homarus americanus Adult American lobsters tend to dwell in depths of below 50 meters. However, some can live at depths of about 750 meters. They can weigh up to 44 pounds and reach a length of about 25 inches, however they are typically around 2 feet long and weigh 3 pounds. The American lobster’s preferable habitat is on rocky surfaces covered with algae, because algae attract animals that the lobsters prey on. This habitat allows the lobster to hide within the cracks, where it can hide from predators in its environment such as flounder, cod, crabs and eels.
Also known as transitional fossils. An example of transitional fossils is the recent discovery Pappochelys, a 240-million-year-old reptile with a set of emerging turtle like features, there are missing links between both species yet exhibit traits of both. The existence of the abundant amount of fossils shows the forever developing variety of life since it primarily
The Taung Child is the fossilised skull of a young Australopithecus africanus. When this 3 year child's skull was found in 1924, it was one of the first early human fossils to be found in South Africa. It was discovered by Raymond Dart through a local quarrymen. The Taung Child’s first molars had only just begun to rupture through the gum suggesting that the fossilized jaw belongs to a child. Upon closer inspection of the hominid’s dental development, crown formation, and root length suggest the child’s age was 3.3 years at death.
The reason the author brings this material is that there is so much more to know than most people care about. He uses logos by bringing some facts to support his argument, "Moreover, a crustacean is an aquatic arthropod of the class Crustacea, which comprises crabs shrimp, barnacles, lobster and freshwater crayfish. All this right there in the encyclopedia (Wallace 109)". This is the example where he gives detailed information about the classification of a lobster. He comes up with this argument in his essay for the purpose of persuading the reader to trust him as the writer of this essay by giving this background.
Earth was formed 4.568 billion years ago and early earth consisted organic molecules; hydrogen compound, methane, water vapor, and ammonia. Life as we know it today did not exist. Oxygen did not come into the atmosphere until 2.5 billion years ago, however cellular life came about 3.5 billion years ago. There are multiple origins of life that came about at different times but visible life happened in the Phanerozoic Eon. During the Phanerozoic Eon, there were about 8 major evolutionary transitions because within the 8 transitions there were five major extinctions.
Swift, strong, stealthy, and fascinating, sharks are marvelous fish. They are well known for their incredible sharp teeth, and vicious behavior. Sharks are extremely unique and an essential part of the ocean and sea ecosystem. There are over five hundred different types of sharks living in the world. Sharks can be divided into two main groups, large and small.
Leather Back Turtle and its correlation with Human’s Food and Water Resourcing Activities. Species Description Weight: Adult: up to 2,000 pounds (900 kg) Hatchling: 1.5-2 ounces (40-50 g) Length: Adult: 6.5 feet (2 m) Hatchling: 2-3 inches (50-75 cm) Appearance: primarily black shell with pinkish-white coloring on their belly Lifespan: unknown Diet: soft-bodied animals, such as jellyfish and scalps, and pyro0somes Behavior: females lay clutches of approximately 100 eggs several times during a nesting season, typically at 8-12 day intervals. Life Cycle Juvenile leatherbacks may remain in tropical waters warmer than 26°C, near the coast, until they exceed 100cm in curved carapace length. Adults are pelagic and live in the open ocean, sometimes
The Congregation 20 Fun Facts about Alligators INTRODUCTION El garto means “the lizard” it’s a Spanish word, where the name alligator came from. Over 200 million years ago alligators already existed. Did you know that the largest recorded alligator was in Everglades National Park located in Florida? It towers to 17 feet and 5 inches that is 5.31 meter! Do you know the difference between an alligator and a crocodile?
Once feeding begins ticks release saliva that literally glues the tick in place so it cannot be removed easily. Once feeding is finished, which can be up to a week, the engorged tick drops off the host, lays eggs, and dies. Depending on the species a single female tick can lay up to 6500 eggs. Ticks are often associated with disease, and rightfully so. Ticks are carriers of two major diseases Lyme disease and Rocky Mountain spotted fever.
The earliest ancestors of the gray whale existed over 30 million years ago. 48. The only known natural predators to the gray whale is a pod of killer whales. In terms of other predators gray whales may also face occasional attacks by whale poachers and hunters. 49.
The chalk was formed due to calcium carbonate left behind by decomposed shells of microscopic algae that populated the Seaway. This layer of the Niobrara contains much evidence of life of vertebrates and aquatic life, including birds. The limestone layer is a thick layer of limestone separated from the chalk layer by shale. The limestone layer also contains many fossilized remains, but is best known for having marine reptiles that have been preserved rather well. The currents from the different seas as well as the draining of surface water into the seaway were important in the formations of these layers and the fossilization of marine life (Colorado Parks and
That was just some of the fact about the Baryonyx. There 's more to learn about this magnificent dinosaur and where it lived. The baryonyx ate fish like the Igdabatis,Anomoeodus,Aulolepis and etc. and also young Iguanodons. The baryonyx fossil had fossilised fish skeletons and Iguanodons fossil in it’s stomach and in it’s dung.
Boating and snorkeling. Among the Florida Keys lives many different types of species. For instance jellyfish like the Cassiopeas, Cannonball jellies, Sea thimble, moon jelly, comb jelly and the man o’ war which is also known as the bluebottle jellyfish. All of these jellyfish are either really common in the keys or come wandering in in curtain months of the year. There are also two lobsters found in this area, the spiny lobster and the spotted spiny lobster.