Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 21.3, Problem 3SC
To determine
The approximate time duration during which prokaryotic cell came into existence.
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d. all) of these
7. The development of ozóne in the stratosphere and oxygen in the atmosphere first
made possible the development of
a. complex organisms
b. single-cell organisms
c. cyanobacteria
d. all of these
8. Today, many scientists think that
a. 'birds evolved from dinosaurs
b. dinosaurs evolved from reptiles
c. birds evolved from amphibians
d. both a andb
9. Ediacaran organisms first appeared during the
a. Precambrian Time
b. Cambrian Period
c. Permian Period
d. none of these
10. As
a. cyanobacteria
b. trilobites
evolved, they changed Earth's atmosphere by producing oxygen.
c. reptiles
d. dinosaurs
Geologic Time
What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?
a.
Radioactive dating
Selected:b.
Law of superposition
This answer is incorrect.
c.
Relative dating
d.
Index fossils
Approximately how old is a fossil that contains 1.5g of C14 and 198.5g of C12? Remember that C14 decays to C12 with a half life of 6,000 years.
Chapter 21 Solutions
Integrated Science
Ch. 21.1 - Prob. 1SCCh. 21.3 - Prob. 2SCCh. 21.3 - Prob. 3SCCh. 21.3 - Prob. 4SCCh. 21.3 - Prob. 5SCCh. 21.8 - Prob. 6SCCh. 21.8 - Prob. 7SCCh. 21.9 - Prob. 8SCCh. 21.9 - Prob. 9SCCh. 21.10 - Prob. 10SC
Ch. 21.11 - Prob. 11SCCh. 21.11 - Prob. 12SCCh. 21.12 - Prob. 13SCCh. 21.12 - Prob. 14SCCh. 21.12 - Prob. 15SCCh. 21 - Prob. 1CQCh. 21 - Prob. 2CQCh. 21 - Prob. 3CQCh. 21 - Prob. 4CQCh. 21 - Prob. 5CQCh. 21 - Prob. 6CQCh. 21 - Prob. 7CQCh. 21 - Prob. 8CQCh. 21 - Prob. 9CQCh. 21 - Why has Lamarcks theory been rejected?Ch. 21 - Prob. 11CQCh. 21 - Prob. 12CQCh. 21 - Prob. 13CQCh. 21 - Prob. 14CQCh. 21 - Prob. 15CQCh. 21 - Prob. 16CQCh. 21 - Prob. 17CQCh. 21 - Evolution is a fact. Evolution is a theory....Ch. 21 - Prob. 19CQCh. 21 - Prob. 20CQCh. 21 - Prob. 21CQCh. 21 - Prob. 22CQCh. 21 - Prob. 23CQCh. 21 - Prob. 1PEACh. 21 - Prob. 2PEACh. 21 - Prob. 3PEACh. 21 - Prob. 4PEACh. 21 - Prob. 1PEBCh. 21 - Prob. 2PEBCh. 21 - Prob. 3PEBCh. 21 - Prob. 4PEB
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Why do scientists generality think that liquid water is necessary for the origin of life?arrow_forwardWhat would happen to a life-form if the information handed down to offspring was always the same? How would that endanger the future of the life-form?arrow_forwardA single human cell encloses about 1.5 m of DNA, containing 4.5 billion base pairs. What is the spacing between these base pairs in nanometers? That is, how far apart are the rungs on the DNA ladder?arrow_forward
- The Oldest Snack Food? In Bat Cave, New Mexico, archaeologists found ancient human remains,including cobs of popping corn whose C14-to-C12 ratio was approximately 48% of that found in living matter.Estimate the age of the corn cobsarrow_forwardIf you represent Earth’s history by a line 1 m long, how long a segment would represent the 400 million years since life moved onto the land? How long a segment would represent the 4-million-year history of human life?arrow_forwardImagine you are a scientist and you are working with a museum on an archaeology exhibit. They tell you that they have an ancient leaf they believe to be 24,000 years old. You use radiocarbon dating and discover that the leaf contains 1/32 of the carbon-14 of a living plant. What do you tell the museum?(half life of 14-carbon = 6000 years)arrow_forward
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- - Life x S HW 18-2 w NWP Assessment Player Ul Appli x on.wiley.com/was/ui/v2/assessment-player/index.html?launchld 4368ed39-f195-462d-a6ef-6b156bd84883#/question/3 Wa. O YouTube Maps M Gmail Question 4 of 6 0.2/2 Your answer is partially correct. The drawing shows an equilateral triangle, each side of which has a length of 4.25 cm. Point charges are fixed to each corner, as shown. The 4.00 UC charge experiences a net force due to the charges qa and qg. This net force points vertically downward and has a magnitude of 568 N. Determine (a) charge qa. (b) charge qg. +4.00 C (a) Number -1.99E+7 Units (b) Number -1.99E+7 Units re to search O N O 59°F O 40 G DELL F3 F5 F6 F7 F8 F9 F10 F11 F12 PrtScr Insert Delete Po 23 2$ & ) Backspace 3 6 8 E T. Y. U --- IIIarrow_forward1.) Gases in the atmosphere keep the temperature in a range to support life on earth. 2.) There is an exact place where the atmosphere ends.arrow_forwardWith explanation plaeasearrow_forward
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