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do archaebacteria use chemosynthesis
From the Permian extinction’s devastation arose a reptilian sheep called . Fossil hunters of early Triassic sediments have been frustrated for many years, as nearly are , because it was about the Permian extinction’s only land animal survivor. There has been about why it survived when almost nothing else did. No single animal ever dominated Earth’s land masses as thoroughly as did during the early Triassic. was probably a burrower (many have likened to a pig because of that burrowing), which may have provided the shelter needed to survive the Permian holocaust. It may also have been a and could eat most surviving plants. But some think that its survival, when almost every other species died, was due to luck. Luck is a surprisingly common proposed explanation for evolutionary events and outcomes, and some creatures seemed to be in the right place at the right time while others were in the wrong place at the wrong time. The spread of was also aided by two other facts: the land masses , so could simply walk to dominance of Earth; and few predators capable of eating a survived. One (being semi-aquatic may have also helped species survive the Permian extinction), as did , but not much else did. was a , as were the dominant land animals before the Permian extinction.
Because the subject needs to be addressed and I have been involved with it, I will describe what I am aware of regarding the UFO and extraterrestrial (“ET”) issue. The era of UFOs generally began with the . The CIA was founded a few months later. In the early 1990s, an emergency room doctor, Steven Greer, mounted an effort called the to inform the public about the UFO/ET issue, and Brian was prominently involved, . After years of briefing officials from many institutions, including the Vatican, United Nations, White House, Pentagon, and the USA’s Congress (and he received a scoffing or disbelieving reaction), secret congressional hearings were held so that witnesses could testify (and key Disclosure Project members immediately afterward). Ed Mitchell, who , co-chaired the hearings and about the ET presence. One Disclosure Project witness was , and , at least of those who could talk publicly about them. I am aware of recent astronaut close encounters that have been classified, as confessed by the astronauts. Brian had no doubt that his and the UFO-research “offer” were related.
Photosynthesis Tests & Worksheets - All Grades
Chimpanzees are the most tool-using non-human great ape, and . One problem with studying today’s animals and applying those findings to their ancestors is that their line has evolved too. The did not look like today’s chimpanzees, and probably did not act quite like them. However, chimpanzees and gorillas adapted to environments that have not remarkably changed for the past 8-10 million years, and it is unlikely that they have dramatically changed over that time. Orangutans are similar. Scientists have argued that since there is little evidence of morphological change in those great apes in the intervening years since they split from the human line, particularly in their cranial capacity, that they probably act similarly today and have similar capacities to their distant ancestors. Today’s chimps have . They make and use tools, and an . All great apes have and some even .
Female simians usually stay within their society of origin, while males leave. That is how simians prevented , but that pattern is reversed in chimpanzee and gorilla societies, in which females usually leave. Sexual coercion of females is common behavior among simians. and are among the few simians that overcame it, and it seems to have been due to ecological dynamics. Humans have partially discarded that behavior during the industrial age. Those are obviously highly charged areas of behavioral research, and is a scientific discipline. A is arguably the of science, and behavioral sciences have often been plagued with a lack of them, going back to , which has caused some to say that psychology is not really a science. This essay will soon sail into some of those murky waters.
Food Web: Zoom Rainforest - Enchanted Learning
Many into their structures. also incorporate silica, and those are among the few life forms that use silicon, although it is one of . Diatoms seem to gain , and plants seem to have structural advantages, but it is thought that plants also used silica for a defensive measure, as it helps make plants unpalatable. Eating plants full of silica structures, called , is like chewing sand. This is particularly true with grasses, as phytoliths make chewing them a tooth-wrecking process, particularly for ruminants and their thorough chewing. Grazing herbivores have heavily enameled hypsodont teeth (also called high-crowned teeth) to . In North America, hypsodont herbivores proliferated while those without that heavy enamel (also called low-crowned teeth), which were browsers instead of grazers, declined. By about nine mya, North American browsers had largely vanished and grazers dominated the new grasslands. Earth kept cooling and drying, and fewer than seven mya, steppe vegetation began replacing savanna-like grasslands, and forests were decimated. This led to the greatest mass extinction in pre-human North America in the Cenozoic Era, as many species of horses, mastodonts, bears, dogs, and small predators went extinct, as well as mice, beavers, and moles. Asia and Africa were hit similarly, although not quite as hard as North America seemed to be, but South America and Australia hardly seemed affected at all. New Zealand’s surrounding seafloor changed from warm-water communities to the Southern Ocean communities that it has today.
Whatever the causes were, the early Miocene was warm, and as with around the North Pole, migrating in the Arctic became easy again, and North America was invaded by Eurasian animals . The prominent descended from Asian migrants, and the strange-looking was also an Asian immigrant, which had claws on its forefeet, like a sloth’s. also migrated from Asia, and the arrived. Those North American days saw of a that was rhino-sized. A lived then, and the appeared in the early Miocene and migrated to Asia from North America. The general Oligocene cooling gave rise to tough, gritty plants, and deer, antelope, elephants, rodents, horses, camels, rhinos, and others developed , which had greatly expanded enamel surfaces for grinding those plants. Carnivores also migrated from Asia, such as , an , and . North America’s rodents and rabbits, , continued to diversify. Later in the Miocene’s warm period, the trickle of Asian immigrants became a flood, including a that weighed up to 600 kilograms (1,300 pounds), and two large groups of immigrant rhinos, and several genera , displaced endemic ones. In a late-Pliocene count of North American mammalian genera, a third were not native to North America. But North American fauna was unscathed compared to other continents. Below is an artist's conception of Miocene North America. (Source: public domain from Wikipedia)
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Although , when the late-Eocene cooling began, Africa became the primary primate refuge. Around the early Oligocene, a from Africa and evolved in isolation for the next 30 million years. Just as , simians marginalized prosimians, beginning in the Oligocene. Today’s prosimians either live where simians do not, or where they coexist with simians, they are nocturnal. Prosimians have simple social organization; most nocturnal prosimians lead solitary existences. have societies of up to 20. Monkeys have far more complex social organization than prosimians, and , although societies of about 50 are typical. Capuchins are considered the most intelligent New World monkeys, and their societies have . Studies of simian societies have shown them engaging in crude versions of human politics, which , which has caused some to .
Life in Extreme Water Environments - sea, depth, …
Early primate migrations and extinctions led to a disjointed geographical distribution, as they could only live in tropical canopies. When tropical forests shrank in the cooling conditions that led to the current ice age, primates such as tarsiers found themselves in isolated refugia. In the late Eocene and late Miocene, when tropical canopies disappeared, the primate lines inhabiting them went extinct unless they used an escape route to a surviving tropical forest.
photosynthesis notes - Biology Junction
That had thick teeth that meant that it had abandoned the arboreal ape diet and brings up perhaps the single biggest question of the early human line: “When our ancestors became bipeds?” One piece of evidence for bipedalism is where the ; if it is underneath the skull, it suggests an upright posture and, hence, bipedalism. There is had a skull hole that meant bipedalism. Skull and vertebrae evidence, changes in the shoulders, arms, and hands of apes from onward, as well as the pelvis, legs, knees, ankles, and feet, are used whenever relevant ape fossils are found to determine what kind of posture they had, all the way from swinging from branches to walking upright. The great range of motion of the human arm has that arboreal heritage to thank.
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