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alexira [117]
2 years ago
12

The first direct evidence of primitive cellular life was the 1977 discovery of _________ fossils in the swartkoppie chert, a typ

e of granular sedimentary rock rich in silica.
Social Studies
1 answer:
Marrrta [24]2 years ago
7 0

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.

Learn more about fossils here: brainly.com/question/11829803

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Question 20
Leni [432]

Explanation:

Ukraine ....... ........

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6 0
3 years ago
What properties are useful in distinguishing and modeling the various distinct layers and structures of Earth?
Shalnov [3]

Answer: The compositional, mechanical and outermost layer

Explanation:

They are some vital properties that are considered when looking at the properties are useful in distinguishing and modeling the various distinct layers and structures of Earth. They are the mechanical layers, compositional later and the outermost solid layer. The mechanical layers are determined by their physical features, the compositional layers are determined by their components, while the outermost layer describes the natural satellite

6 0
3 years ago
The theorist who believed that children learn language when they are reinforced by parental attention was?
defon

The theorist who believed that children learn language when they are reinforced by parental attention was B.F.Skinner.

B.F.Skinner was a celebrated American psychologist who advanced the behaviorist theory of learning. This theory is based on the idea that learning occurs through a method of ‘conditioning’, which when stimulus, rewards, and punishments are combined to drive the learning process.

The conditioning relies on what Skinner calls reinforcement. Reinforcement is of two types, namely positive reinforcers, which are the rewards after meeting a target, and negative reinforcers, which refers to the unpleasant consequences of failing to meet the target.

Actions that are followed by negative reinforcers tend to weaken, while those followed by positive reinforcers tend to be repeated. For example, children can be encouraged to learn language if they receive consistent positive reinforcement from their parents every time they learn a new word or phrase.

To learn more about B.F. Skinner : brainly.com/question/10580861

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5 0
2 years ago
What are some of the ways citizens can participate in government?
yKpoI14uk [10]

Answer:

people can participate by standing in election

4 0
3 years ago
Read 2 more answers
Why did American colonists believe that British laws were unfair?
Bingel [31]
Many colonists were unhappy because they did not have self government, this meant that they could not govern themselves and make their own laws.
8 0
3 years ago
Read 2 more answers
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