https://padlet.com/tylerevans990304/qut5qbeip5hf Made with ♥ en-us 2018-03-01 19:08:06 UTC 2018-03-05 19:12:28 UTC hello@padlet.com tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237127302 Biogenesis is the production of new living organisms or organelles. Conceptually, biogenesis is primarily attributed to Louis Pasteur and encompasses the belief that complex living things come only from other living things, by means of reproduction.]]> 2018-03-01 19:13:43 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237127302 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237128434 The supposed production of living organisms from nonliving matter, as inferred from the apparent appearance of life in some supposedly sterile environments.]]> 2018-03-01 19:15:17 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237128434 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237129275 Redi gained fame for his controlled experiments. One set of experiments refuted the popular notion of spontaneous generation -- a belief that living organisms could arise from nonliving matter. Redi has been called the "father of modern parasitology" and the "founder of experimental biology".]]> 2018-03-01 19:16:22 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237129275 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237133291 The theory of spontaneous generation was finally laid to rest in 1859 by the young French chemist, Louis Pasteur. The French Academy of Sciences sponsored a contest for the best experiment either proving or disproving spontaneous generation.]]> 2018-03-01 19:21:19 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237133291 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237134482 He both disproved Spontaneous Generation and proved biogenesis. Was Redi ... 1700s-About the same time Redi completed his experiment, scientists began using a NEW TOOL.....the microscope. What were ... The boiled broth became contaminated only when microorganisms from the air entered the flask.]]> 2018-03-01 19:22:56 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237134482 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237136280 Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.]]> 2018-03-01 19:25:23 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237136280 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237137058 Alpha (α), beta (β-) and gamma (γ) decay. When the nucleus of an atom possesses either too many or too few neutrons compared to the number of protons it becomes unstable. These are called radioactive isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation.]]> 2018-03-01 19:26:35 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237137058 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237137830 Chemical and physical processes on earth, aided by the emergence of natural selection, could have produced very simple cells through a sequence of 4 main stages: - The abiotic (nonliving) synthesis of small organic molecules, such as amino acids]]> 2018-03-01 19:27:44 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237137830 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237139768 The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic components. .... Aleksandr Oparin and English scientist J. B. S. Haldane both separately proposed what's now called the Oparin-Haldane hypothesis.]]> 2018-03-01 19:30:47 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237139768 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237140378 The Oparin-Haldane hypothesis suggests that life arose gradually from inorganic molecules, with “building blocks” like amino acids forming first and then combining to make complex polymers. The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic.]]> 2018-03-01 19:31:44 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237140378 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237141038 Packing molecules to protocells, droplets with membranes that maintained and internal chemistry different from heat of surroundings .... sedimentary rocks tend to consist of sediments of differing ages .... they can remain dormant for centuries, able to rehydrate and resume metabolism when their environment improves.]]> 2018-03-01 19:32:37 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237141038 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237143496 Properties of Life. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these eight characteristics serve to define life.]]> 2018-03-01 19:36:09 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237143496 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237569892 A microscopic spherical structure composed of many protein molecules that are organized as a membrane. coacervate. a mass of droplets of colloidal substances, such as lipids.]]> 2018-03-02 19:21:36 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237569892 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237570934 It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene. However, single-stranded RNA is rather unstable and is easily damaged by enzymes.]]> 2018-03-02 19:23:26 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237570934 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237571883 How life originated and how the first cell came into being are matters of speculation, since these events cannot be reproduced in the laboratory. Nonetheless, several types of ..... The acquisition of aerobic bacteria would have provided an anaerobic cell with the ability to carry out oxidative metabolism.]]> 2018-03-02 19:25:09 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237571883 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237572419 Living things have evolved into three large clusters of closely related organisms, called "domains": Archaea, Bacteria, and Eukaryota. Archaea and Bacteria are small, relatively simple cells surrounded by a membrane and a cell wall, with a circular strand of DNA containing their genes. They are called prokaryotes.]]> 2018-03-02 19:26:06 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237572419 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237572848 (Some researchers claim that the first cells were likely already autotrophic, acquiring energy directly from the environment and skipping altogether the heterotrophic stage—it's hard to know for sure when all the evidence was eaten.)]]> 2018-03-02 19:27:00 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237572848 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237573306 First photosynthetic bacteria. They absorbed near-infrared rather than visible light and produced sulfur or sulfate compounds rather than oxygen. Their pigments (possibly bacteriochlorophylls) were predecessors to chlorophyll.]]> 2018-03-02 19:27:56 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237573306 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237573756 How could it be catalyzed before proteins with the appropriate enzymatic specificity existed? The beginnings of an answer to this question were obtained in 1982, when it was discovered that RNA molecules themselves can act as catalysts.]]> 2018-03-02 19:28:46 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237573756 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237574239 In addition to using ATP as their source of intracellular chemical energy, all present-day cells carry out glycolysis, consistent with the notion that these reactions arose ... The first photosynthetic bacteria, which evolved more than 3 billion years ago, probably utilized H2S to convert CO2 to organic molecules.]]> 2018-03-02 19:29:44 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237574239 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237574631 Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.]]> 2018-03-02 19:30:37 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237574631 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237575229 The endosymbiotic theory has been widely accepted as one of the possibilities of the origins of mitochondria, chloroplasts, and other eukaryotic organelles and cells. Mitochondria and ... These prokaryotic cell characteristics include: an enclosed double membrane, circular DNA, and bacteria-like ribosomes.]]> 2018-03-02 19:31:56 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237575229 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237575688 Plants evolved from freshwater green algae, Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue.

]]> 2018-03-02 19:32:52 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237575688 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237576335 They both have cellulose in their cell walls, and they share many of the same chemicals that give them color. ]]> 2018-03-02 19:34:20 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237576335 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237576723 Between mass extinctions, successful species tend to persist and suppress new types ---->Just as in politics, incumbency is a big advantage • But a mass extinction tends to wipe out many species, regardless of their former success, thus opening vacant niches into which the lucky surviving species can radiate. ]]> 2018-03-02 19:35:13 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/237576723 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/238291526 Nearly every process on Earth's surface has been changed by human activities, heightening the need for new research on human-landscape dynamics and for a greater capacity to predict process responses to human influence.]]> 2018-03-05 19:02:42 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/238291526 tylerevans990304 https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/238292120 The idea that life may have started with self-replicating molecules of RNA is based on the observation that RNA can. take a great ... Explain how early RNA molecules might have been able to respond to natural selection. Each RNA ... What role did the appearance of the ozone layer play in the evolution of early life on Earth.]]> 2018-03-05 19:03:31 UTC https://padlet.com/tylerevans990304/qut5qbeip5hf/wish/238292120