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APSC 151- Life Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions £10.90   Add to cart
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APSC 151- Life Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions
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APSC 151- Life Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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  • August 4, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • apsc 151 life exam questions answers 100 sc

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APSC 151- Life Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | With Expert Solutions

name some useful isotopes for radiometric dating - rubidium 87, thorium 232, uranium 235&238,
potassium 40, Carbon 14



why would you date with potassium 40 - it has a very long half life and can be found in many minerals



why would you date with carbon 14 - it can date more recent geologic events because of its shorter half
life



what makes the Hadean Eon special - there was no life on earth (4.6-4 billion years), this is the eon
where the earths crust and internal iron core formed,water formed in the first 100-200 million years
from out gasing and comets



when was the first life on earth - 4 billion years ago



what is significant about the archean eon - there was constant volcanic activity, no oxygen, acidic
oceans, and bacteria are forming which then produce oxygen

*note oxygen only gets released at end of the archean



describe archaea - a cell without nuclei, and an extremophile it lived in high temps. and oxygen lacking
environments



archaea colonies are called - stromatalites



how long ago was the archean eon - 4-2.5 billion years ago



the proterozoic eon began what age - the age of oxygen, this caused a mass extinction of bacteria that
fed on CO2

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