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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Answer:
A. The USS Maine exploded in Cuba’s Havana harbor.
Explanation:
The USS Maine warship was in Cuba's Havana Harbor on a sunny day, when suddenly it exploded. The United States assumed it was Spain's fault and then the United States declared war on Spain. The Spanish and Americans fought the <u>Spanish-American</u> <u>War</u>. The United States won the war.
Answer:
The North wanted the new states to be free states. Most northerners thought that slavery was wrong and many northern states had outlawed slavery. The South, however, wanted the new states to be slave states
Explanation:
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Answer:
<h3>c. mandate.</h3>
Explanation:
A mandate is a command or an order that necessitates an individual or an organization to act in a specific manner. A court may impose mandate to make certain obligations or activities necessary as part of a legal process on certain cases.
Here, judges ordering Massachusetts to change its way of recruiting firefighters, even though the state does not receive aid from the federal government for fire fighting is referred to as mandate. The court necessitates and makes the state follow certain obligations through the provision of mandate.
