The Stone Age marks a period of prehistory in which humans used primitive stone tools. Lasting roughly 2.5 million years, the Stone Age ended around 5,000 years ago when humans in the Near East began working with metal and making tools and weapons from bronze. Paleolithic Period, also spelled Palaeolithic Period, also called Old Stone Age, ancient cultural stage, or level, of human development, characterized by the use of rudimentary chipped stone tools. The Mesolithic is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymously, especially for outside northern Europe, and for the corresponding period in the Levant and Caucasus. Neolithic, also called New Stone Age, final stage of cultural evolution or technological development among prehistoric humans. ... The Neolithic followed the Paleolithic Period, or age of chipped-stone tools, and preceded the Bronze Age, or early period of metal tools. Hominids are the group of primates that includes humans, gorillas, and chimpanzees, among others. The word hominid originally referred only to humans, and its Latin root reflects that: homo, or "man." Today scientists use it to talk about any of the great apes (including humans).
Answer:The Stone Age definition: a prehistoric period when weapons and tools were made of stone or of organic materials such as bone, wood, or horn. The Stone Age term: The Stone Age, whose origin coincides with the discovery of the oldest known stone tools, which have been dated to some 3.3 million years ago, is usually divided into three separate periods—Paleolithic Period, Mesolithic Period, and Neolithic Period—based on the degree of sophistication in the fashioning and use of tools. Paleolithic era definition: Paleolithic Period, also spelled Palaeolithic Period, also called Old Stone Age, ancient cultural stage, or level, of human development, characterized by the use of rudimentary chipped stone tools.
The substitution bias in economic index numbers appears when the possibility of a consumer to change the consumption of a good - that has become more expensive relative to others - for a cheaper one, is ignored. Thus, looking at the CPI (Consumer Price Index), as an indicator of how much the consumer cost of living has raised over time, without eliminating the substitution bias, can over-estimate this inflation effect.
<span>Jordan is frightened by the sound of a train whistle. the sound is a "Stimulus".
A stimulus is an effect from outside which affects an action or an activity, sometimes triggering some psychological response. For example in the given example the sound of the train is an external effect (Stimulus) which triggers the feeling of fright in Jordan. </span>
Microbial communities defend human body against pathogenic microbes which are responsible for disease prevalence. Some of the prime examples of diseases that are transferred through pathogenic microbes to their host are Salmonella, Dengue and E. coli etc. Hence, disrupting the microbial communities can make us more susceptible to diseases.
1. No confidentiality. This is the deadliest downfall of crowdsourcing. ... Putting your naming challenge out for crowdsourcing can clue in competitors to what you're up to and make it possible for someone else to see your great new idea and run away with it.
