The half life of C14 is 5730 years. I have a sample that I dug up from a sea cuc
ID: 100927 • Letter: T
Question
The half life of C14 is 5730 years. I have a sample that I dug up from a sea cucumber fossil. I expected .00015ppm of C14 in my living sample, but instead I found that there was exactly1/8th of the expected ratio. How old is my specimen?__[x]__years old
Use the graph provided for assistance.
_______
The oxygenic pathway was a significant achievement in life. The oxygen comes from the photosynthesis cycle. Specifically what event in photosynthesis provides the oxygen?
Photosynthesis - specifically the breakdown of water in the light reactions
Cellular respiration - specifically the oxidative phosphorylization
Cellular respiration - specifically from glycolysis.
Photosynthesis - specifically the breakdown of carbondioxide in the dark reactions
_____________
he hypothesized model in which eukaryotes evolved from prokaryotes by engulfing other organisms and then creating a symbiotic relationship.
plastid hybridization
cytokinesis
pinocytosis
endosymbiont
none of these
Photosynthesis - specifically the breakdown of water in the light reactions
Cellular respiration - specifically the oxidative phosphorylization
Cellular respiration - specifically from glycolysis.
Photosynthesis - specifically the breakdown of carbondioxide in the dark reactions
100 u 25 17190 22920 286501 7 0 0 5730 11460 Years ElapsedExplanation / Answer
1. The answer will be 5730 X 3 = 17190. To become 1/8 of the original amount, 3 half life period will require because after first half life amount will become 1/2, after anothe half life the amount will become 1/4 and after third half life period the remainig amount will be 1/8 of the original amount. Hence the total time required to become 1/8 of the original amount will be 5730 (half life) X 3 = 17190. Thusw your specimen is 17190 years old.
2. First option is correct. In light reaction phase water splits into oxyen, hydrogen ion and electrons.
3. The correct answer is 4th option that is endosymbiont. According to endosymbiosis theory mitochondria and plastids were engulfed by prokaryotic cells which were once independent. After engulfing both the prokaryotic cells and endosymbiont (mitochondria and plastid) were mutually benifitted. This theory suggest the evolution of eukaryotes from prokaryotes.
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