Each period has its distinctive characteristics, historical and cultural background. PHILIPPINE MEDIA AND LITERATURE DURING THE PRE-SPANISH ERA The following are accounts of existence and developments of Philippine literature from the Pre-Spanish Colonization: The Start of Recorded History The end of Philippine prehistory is April 21 900 AD, the date inscribed in the oldest Philippine document found so far, the Laguna Copperplate Inscription. Era/Period/Epoch/Division: Time (Millions of Years Ago) Hadean Time. Fossil evidence for the first chordates. The first three periods of Western Music History are classified as Medieval, Renaissance, and Baroque. In this period the first known represented of most animal phyla evolved. Most notated manuscripts from the Medieval period came from the church or places connected to the church, and so most pieces have a religious subject. Renaissance music is vocal and instrumental music written and performed in Europe during the Renaissance era. 6000-5000: Archaeozoic Era. It is the first division of the Paleozoic Era (542Ma -251Ma). Homo erectus. When it was first identified in the Burgess Shale, the bizarre-looking Opabinia was adduced as evidence for the sudden evolution of multicellular life during the Cambrian period ("sudden" in this context meaning over the course of a few million years, rather than 20 or 30 million years). In order to talk more easily about the past and the significant things that have happened during the early days of mankind, and also to have a clear understanding of history, time is divided into blocks called “periods.” It helps people understand events in sequence. 200 MA – Beginning of "Jurassic Era"; Dinosaurs are the dominant life form on Earth. Political Science Class 12 Important Questions Chapter 11 Era of One-Party Dominance is part of Political Science Class 12 Important Questions. However, fossil evidence in the Burgess shales (550 million years ago) included a finned or backboned swimming animal similar to the living lancelet called a Pikaia and was the predecessor to a group of fish-like animals that were jawless (apart form modified parasitic forms) and consequently could only feed on micro-organisms and small animals. These rocks are approximately 570 million years old. These computers were very notorious and particular for the magnitude of their size and for the little power to acquire one. Which of these is NOT a true statement? What is the characteristic feature of Jurassic period of Mesozoic era? The first whales also started forming in the Paleogene Period. Named after the area of fine coal deposits in Pennsylvania. During Hadean time, the Solar System was forming, probably within a large cloud of gas and dust around the sun, called an accretion disc. Time-travelling visitors to this era have included: Green Lantern (Hal Jordan) and Corky Baxter. Green areas represent land above sea-level at that time, with red indicating mountain ranges. The presence of these structures greatly enhanced the chance of an organism becoming a fossil. These Periods are in turn subdivided into Epochs, based on the changing life patterns of the times. Spanning seventy years, the classical period is a time when composers began pulling in the reigns of the many baroque period musical styles by creating strict compositional "rules and regulations." The Ordovician was the first period that crinoids experienced adaptive radiation. It also began the Cambrian Period. Hadean time is not a geological period. Members of the subphylum Urochordata, commonly called tunicates, belong to the deepest-branching lineage of chordates. They also have pharyngeal pouches that are present at some stage in their life cycle. c. Homo habilis. b. Australopithecus africanus. The first generation of computers was launched in the middle of the 20th century, specifically between 1946 and 1958, a period that generated great technological advances based on the search for an aid instrument in the scientific and military fields. The first chordates appear as fossils in rocks from the Cambrian period. It is located between the digestive tube and the nerve cord, providing skeletal support through the length of the body. Though we can assume that music began far before 1150, the Medieval period is the first in which we can be sure as to how music sounded during this time. Uploaded By ahigh15. The second period of adaptive radiation occurred in the Triassic, following the Permian mass extinction (250 mya). 66.4 Million Years Ago to now. 256 MA – First mammals form on Earth. Line is the foundatio … n of all drawings. Cambrian Period (Paleozoic Era) 544-505. The Neolithic period was truly a time of change, as it was the roots of the following ages that brought about the birth of civilization as we know it. The Pennsylvanian Period saw the emergence of the first reptiles. Invertebrate chordates provide clues to the origin of vertebrates. Yet within their rigidity, great composers like Haydn and Mozart were able to create some of the greatest classical music the world has ever known. Marine animals with mineralized skeletons make their first appearance in the shallow seas of the Cambrian, though only "small shelly fossils" (tiny shells, spines and scales from early All chordates are vertebrates. A. Chordates first appear in the cambrian period of the School University of South Florida; Course Title BSC 1010; Type . It is the first and most versatile of the visual elements. A type of music from the Medieval Era is Gregorian Chant, which was mainly used in the early Christian church. 300 MA – First reptiles with the ability to reproduce out of water (allowing "colonization" of inland areas) form on Earth. The first fossil records of vascular plants, that is, land plants with vascular tissues, appeared in the Silurian period.The earliest known representatives of this group (mostly from the northern hemisphere) are placed in the genus Cooksonia.They had very simple branching patterns, with the branches terminated by flattened sporangia. Neogene Geological Period. The Cambrian period, the first in the Paleozoic era, spans the time between 544 and 505 million years ago. As animal phyla continued to diversify, new species adapted to new ecological niches. Answer to Identify the geologic era and periods in which chordates and the first vertebrates appear.. All vertebrates are chordates. The traits are believed to have evolved due to pressure from predators such as benthic echinoids. When the Neogene Period began, the earth started looking similar to it does today. During the […] Moreover, most of the mountainous landscapes took shape during the Neogene Geological Period. Music during the Renaissance Period became an important leisure activity. Chordates have a single, tubular nerve cord that runs along the back (dorsal) surface of the animal which, in most species, forms a brain at the front (anterior) end of the animal. Era vs Period. d. Homo erectus. Notes. b. The Tertiary Period 66.4-1.6 Million Years Ago Here we have given Political Science Class 12 Important Questions Chapter 11 Era of One-Party Dominance. First birds appeared and the dominant plants are gymnosperms B. The periods that followed the Cambrian during the Paleozoic Era were marked by further animal evolution and the emergence of many new orders, families, and species. Political Science Class 12 Important Questions Chapter 11 Era of One-Party Dominance 1 Mark Questions Question 1. The Cenozoic Era is divided into two parts, the older and longer lasting Tertiary Period and the Quaternary Period in which we live now. Chordates first appear in the Cambrian period of the Paleozoic era 542 mya and. Some aspects of the pre-colonial period have survived into our time. First mammals appeared. (For clarity, the outlines of present-day continents have been added to the map.) Select one: a. The Cambrian* Period begins the Phanerozoic Eon, the last 542 million years during which fossils with hard parts have existed. This period saw the development of large tropical swamps across North America, Europe and Siberia which are the source of great coal deposits. Title of ArtworkName of Artist:Era:Description: The elements of art are concrete visual components that work in tandem with principles of art that organize andharmonize them.1. During what is termed the Cambrian Explosion, living thiungs developed hard structures. Dark blue indicates deep ocean basins, while light blue denotes shallow seas of the continental shelf. D. Dinosaurs became extinct and flowering plants appeared for the first time 1 See answer khursheedsuhail9 is waiting for your help. C. For the first time angiosperms and dinosaurs appeared. Finally, greenery took over most of the landmass, making earth the “green planet” as we know it. The Restoration Period - Research and Writing Further Research: 1. Cambrian Period, earliest time division of the Paleozoic Era and Phanerozoic Eon, lasting from 541 million to 485.4 million years ago. These three characteristics can be used to distinguish chordates from other animals. Scientist call the Cambrian Period the "Cambrian Explosion" because many organisms had hard parts including shells and outer skeletons. Prior to the Cambrian, fossils were quite rare and inconspicuous since the organisms were small. 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