If there is one word to describe the platypus, it would be unique. They differ dramatically from the rest of the mammals. Many people say the platypus aren't mammals and rather marsupials for obvious reasons; however, they are wrong. Platypuses are one of the most interesting of animals and mammals. Platypuses live in one minuscule general area of the world. They live in the freshwater rivers of Tasmania and the coasts of eastern and southeastern Australia (Bradford). Their size ranges from twelve to twenty-four inches, approximately the size of a domesticated house cat. They are painted in an umber colored over the majority of their body (Smith).Platypuses are Platypuses are the most unique mammals to live on Earth.
Researchers and scientists say that the platypus veered away from the shared kindred of birds and reptiles about 280 million years ago. Afterwards, the platypus separated from the mammalian heritage. It is thought that the platypus split from the mammalian lineage before the placenta was evolved. When the platypus split, it supposedly split in between the lineage of lizards and a human-based placental mammal, keeping the traits. Now scientists don't know why it stop evolving and kept its mammal-like features. However, that information is false (Norris). The platypus "stopped evolving" because it
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The typical mating season occurs during June going on to October. When they do mate, the female platypus sprouts an average of two to three eggs, unlike the preponderance of mammals, they generate eggs (Smith ). Only four other kinds of mammals lay eggs, and most of the species are echidnas. This is incredibly spectacular and eminently rare. The duck-billed platypus takes up one fifth of all of the monotremes, the other four species are types of echidnas. This makes the platypus even more unique because it is the only one of its kind (Monotremes Egg-Laying
: The Plesiadapiforms are tiny mouse like creatures that lived during the 10 million period between the extinction of dinosaurs and appearance of humans. This could be our primate ancient ancestor. This primate has around more than 120 different species of its kind.
They evolved into 2 different species by many factors in nature. The factors include genetic drift, mutation, natural selection, and etc. Genetic drift involves the bottleneck effect and the founder effect. I hypothesize that a bottleneck effect took place in the island that the rodents were living in. A natural disaster must of happened and the rodents that had high fitness survived. Therefore since one population survived, that makes them two separate species. I also hypothesize that there was a founder effect in the population of the rodents. A small portion of rodents migrated to Nevis island and reproduced. When this happened this created a whole new population of rodents. Another reason that they could have been 2 different species can be due to gene flow. Some rodents could of migrated to Nevis island.
There are two distinct infraorders of Anthropoidea that have been evolving independent of each other for at least 30,000,000 years. They are the Platyrrhini (New World monkeys) and the Catarrhini (Old World monkeys, apes, and humans). These two diverse groups of species can be distinguished from each other most easily based on the form of their noses and by the number of specific types of teeth.
The Longnose gars reproduction depends on location that the gar is found in. The reproduction does typically happen during the spring or summer months and all dependent on what the water temperature. The female gar will swim into a small, fast moving stream and lay their eggs (Goddard). The Longnose gar eggs are not just normal eggs that most people think of when they think of fish eggs. Their eggs are green and sticky so they can stick to the plants in the fast moving stream (
The finch hybrids before the El Niño of 1983, two different species did not mate each other but during the child, a scandens mated with a fortis and produced four fledgings.
The piping plover usually nests on the sandy beach, some distance away from the water and is often located near a large rock or clump of grass. There are usually 4 eggs in the nest. The eggs begin to hatch for 25 to 30 days.
...however, with further research, it came to light that this was not just a “unique species” but an entire phyla that was new to science (Adler 2013). Why a new phyla? “What made the creatures seem new is they have no living descendants. They represent entire lineages, major branches on the tree of life, left behind by evolution…” (Adler 2013). While other lineages did survive-actually a collateral predecessor of the vertebrates, and that means us! (Adler 2013).
One problem facing pandas is their seeming difficulty in mating successfully. Females have a low frequency of ovulation (once a year in the spring) and the males demonstrate an infamous apathy toward females in heat ((2)). When mating is successful, the female giant panda will give birth, after 96 to 160 days, to a cub that is one-nine hundredth the size of her ((1)). Cubs open their eyes after six to eight weeks, nurse for about nine months, and stay with their mothers for up to three years before venturing out on their own ((1)).
...oling climate and slowly evolved into Homo erectus, and then Homo erectus was affected by sexual selection, the split of their population, and their new necessary diet. They, in turn, slowly evolved into modern Homo sapiens. Natural selection, sexual selection, and genetic drifts all affected these species, and what took them to evolve into us, modern humans.
Gould, Edwin, George McKay, and David Kirshner. Encyclopedia of Mammals. San Francisco, CA: Fog City, 2003. Print.
Males are usually larger than females, but there are no obvious physical differences that mark their sexes. There is only one very slight difference in the pattern of scales in front of the cloaca. Though it is difficult for researchers to identify the sexes, the Komodos seem to have no trouble. They mate between the months of May and August. The female lays about 30 eggs and the incubation cycle is roughly 9 months (Benyus, 1992).
Before there was ash there was the platypus. Before platypus rose to power it was the capital of the great Elystrian Empire. But then the disaster 1480 hit and the great empire was destroyed by tsunamis, earthquakes, and typhoons. The lands known as Platypustan was split into 3 tribes one being known as the tribe of the Platypus. These tribes would war over influence in the Platypustan region with none having complete control. During the 30 year war Kantas and Guwakiu explorers discovered the tribe of Platypus. In desperate need of extra troops the tribe was incorporated into the armies to fight in the war. After the war the leader of the tribe Pontiff Francisca was invited into to the official peace conference. She was then signed a truce with those two nations
In the family of the Spheniscidae lie the Penguins. They are covered with feathers and are warm blooded animals. They are aquatic and birdlike animals. There are 18 different species of penguins, and 6 genera’s. The major species of Spheniscidae include the Emperor Penguin, King Penguin, Royal Penguin, and many more. This one category of Spheniscidae has 3 sub families. Palaeeudyptinae which are Giant Penguins, Paraptenodytinae which are Stout-footed Penguins, and Palaeospheniscinae which are Slender-footed Penguins. All species are differentiated by their looks, characteristics and the way they live. Scientists might confirm a 19th species called Eudyptula Albosignat, also known as the white flippered form of a fairy
When the colony becomes well established, the queen begins to lay some eggs that develop into queens and males. It takes a few years before a colony becomes large enough to send out winged males and young queens to start new colonies. The cycle will now begin all over again. Nests come in all shapes and sizes. One tropical species built a nest that extended forty feet below the surface of the ground.
The world we live in today is full of an exceptional variety of animals. The time it took to conclude to the various sorts of species seen today has been throughout a period of millions of years. The vast majority of these animals are accredited to evolutionary advancements. When the environment changes, organisms have become accustomed to changing to fit their environment, to ensure their species does not die off. These physical changes have resulted in different phyla, ranging from basic structures, like sponges to advance systems, like that of an octopus.