Life’s a Journey – Essay 2 | FunDza

Around the end of that , another unique event transpired with enormous portent for life’s journey on Earth: one microbe enveloped another, and both lived. Today's prevailing hypothesis is that an archaean enveloped a bacterium, either by predation or colonization, and they entered into a . Today’s leading hypothesis, , is that the archaean consumed hydrogen and the bacterium produced hydrogen, which formed the basis for their symbiosis. That unique event transpired around two bya and led to complex life on Earth. That enveloped bacterium was the parent of all on Earth today, which are the primary energy-generation centers in all animals. About 10% of the human body’s weight is mitochondria. If not for the red of and the in skin, humans would look purple, which is the mitochondria’s color. That purple color is probably because the original enveloped bacterium that led to the first mitochondrion was .

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Those attributes are far more easily described than achieved, but my essay is about developing them. The rest of this essay explores those issues in some depth. More than 30 years after I began dreaming of changing the energy industry, I to organize the thousands of reactions to the of FE that I have witnessed, and I will refer to it for the remainder of this essay. I have yet to find a reaction during my journey that does not easily fit into that framework’s categories.

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In this essay’s , I reviewed my journey and touched on Dennis Lee’s, who was my partner during my days of pursuing FE, and that chapter also mentioned amazing explorations. This chapter will dig a little deeper into our experiences. Our odysseys into alternative and free energy all began at about the same time: in 1973-1974, during the , which ended the . Mine started when my first professional mentor invented what was hailed as the , which he invented in about 1968 and began to patent just before the crisis, and it . During that furor, I , spent absorbing its art and culture, and began . Dennis is 12 years older than I am, and as I dreamed of changing the energy industry, he had his in the energy crisis's mayhem. Brian began his alternative energy pursuit around the same time, as he engaged in activism and .

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Journey of Life essays

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Here is a brief summary of this essay. Ever since more than three billion years ago and about a billion years after the Sun and Earth formed, organisms have continually invented more effective methods to acquire, preserve, and use energy. after three billion years of evolution and, pound-for-pound, it used energy . The story of life on Earth has been one of , and in turn influencing them. During the eon of complex life that began more than 500 million years ago, there have been many brief for some fortunate species, soon followed by increased energy competition, a relatively stable struggle for energy, and then cleared biomes and set the stage for another golden age by organisms adapted to the new environments. Those newly dominant organisms were often marginal or unremarkable members of their ecosystems before the mass extinction. That pattern has characterized the journey of complex life over the past several hundred million years. among some animals, which provided them with a competitive advantage.

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Whose Life Is It Anyway?-by Brian Clark Essay - …

I am taking some liberties in calling Turkana Boy a ; he is technically a member of , which is often considered ancestral to , which is the Asian variant’s name. There is great debate regarding how the human family tree branches between and . Some call the various -type species all subspecies of , while others argue for several distinct species. I will not stray far from the orthodox narrative here, for good reason. The reconstructed early human tale is based on very limited evidence, but that evidence will only grow over time, and the tools and techniques for using them will become more sophisticated. Although there may be some upcoming radical changes in the view of the early human journey, efforts of countless scientist and fossil hunter lifetimes support the narrative that this essay sketches, and I respect their findings and opinions, even though I acknowledge many limitations. The human ego, it seems, becomes more involved as the story of life on Earth moves closer to its human chapters.

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Since the most dramatic instances of speciation seem to have happened in the aftermath of mass extinctions, this essay will survey extinction first. A corollary to is that if any critical nutrient falls low enough, the nutrient deficiency will not only limit growth, but the organism will be stressed. If the nutrient level falls far enough, the organism will die. A human can generally survive between one and two months without food, ten days without water, and about three minutes without oxygen. For nearly all animals, all the food and water in the world are meaningless without oxygen. Some microbes can switch between aerobic respiration and fermentation, depending on the environment (which might be a very old talent), but complex life generally does not have that ability; nearly all aerobic complex life is oxygen dependent. The only exceptions are marine life which has adapted to . Birds can go where mammals cannot, , for instance, or being , due to their . If oxygen levels rise or fall very fast, many organisms will not be able to adapt, and will die.