The first direct evidence of primitive cellular life was the 1977 discovery of <u>microbial </u>fossils in the swartkoppie chert, a type of granular sedimentary rock rich in silica.
Some of Earth's high-quality-preserved fossil microorganisms occur in rocks from the Ediacaran period of geologic time, which runs from about 635 to 541 million years ago. Scientists do not absolutely apprehend how this fragile microorganism became fossils. however, a new experimental look at is now dropping more mild.
Some microorganisms secrete iron-coated sheaths that on occasion fossilize. Others may additionally bore into shells or rocks and shape microscopic canals in the shell; such microorganisms are referred to as endolithic, and their borings can be identified at some point of the Phanerozoic.
The earliest regarded fossils on the planet are putative fossilized microorganisms determined in hydrothermal vent precipitates, taken into consideration to be about three.42 billion years old.
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Seek immediate medical attention. advise her to do because she may be having a heart attack
Most heart attacks are characterized by discomfort in the center or left side of the chest that lasts more than a few minutes or that goes away and returns. The discomfort can manifest as pressure, squeezing, fullness, or pain. Feeling weak, dizzy, or faint. You could also break out in cold sweat. It may feel like a squeezing, pressing, or painful pressure. Other upper-body discomfort, such as one or both arms, the back, the neck, the jaw, or the stomach. Breathing difficulties before or during chest discomfort. Breaking out in a cold sweat, feeling nauseated, or dizzy.
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Answer:
The objective of the Congress of Vienna was to provide a long-term peace plan for Europe by settling critical issues arising from the French Revolutionary Wars and the Napoleonic Wars. ... Virtually every state in Europe had a delegation in Vienna – more than 200 states and princely houses were represented at the Congress
Explanation:
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The behavioral perspective views anxiety as a learned reaction.
