21ST CENTURY ASTRONOMY >CUSTOM<
6th Edition
ISBN: 9781324027836
Author: Kay
Publisher: NORTON
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Chapter 24, Problem 5QP
To determine
Reasons that terrestrial life may originated from Earth’s oceans, rather than from land.
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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
1. The article states that Tasmanian devils “remov[e] carcasses that might otherwise slowly rot." Which of the following
ScienceWorld
Name:
CHECK FOR UNDERSTANDING: RETURN OF THE DEVINS
DIRECTIONS: Use the article "Return of the Devils" (p. 20) to answer the questions hello
phrases best defines carcasses?
A decaying plants
B fallen trees
bodies of dead animals
O nonnative predators
d the dramatic decline of the devil population on the island of Tasmania in the past feN d
1.) 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.
Chapter 24 Solutions
21ST CENTURY ASTRONOMY >CUSTOM<
Ch. 24.1 - Prob. 24.1CYUCh. 24.2 - Prob. 24.2CYUCh. 24.3 - Prob. 24.3ACYUCh. 24.3 - Prob. 24.3BCYUCh. 24.4 - Prob. 24.4CYUCh. 24 - Prob. 1QPCh. 24 - Prob. 2QPCh. 24 - Prob. 3QPCh. 24 - Prob. 4QPCh. 24 - Prob. 5QP
Ch. 24 - Prob. 6QPCh. 24 - Prob. 7QPCh. 24 - Prob. 8QPCh. 24 - Prob. 9QPCh. 24 - Prob. 10QPCh. 24 - Prob. 11QPCh. 24 - Prob. 12QPCh. 24 - Prob. 13QPCh. 24 - Prob. 14QPCh. 24 - Prob. 15QPCh. 24 - Prob. 16QPCh. 24 - Prob. 17QPCh. 24 - Prob. 18QPCh. 24 - Prob. 20QPCh. 24 - Prob. 21QPCh. 24 - Prob. 22QPCh. 24 - Prob. 23QPCh. 24 - Prob. 24QPCh. 24 - Prob. 25QPCh. 24 - Prob. 26QPCh. 24 - Prob. 27QPCh. 24 - Prob. 29QPCh. 24 - Prob. 30QP
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- Why do scientists generality think that liquid water is necessary for the origin of life?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_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_forward
- What would happen to a life-form if the genetic information handed down to offspring was copied extremely inaccurately? How would that endanger the future of the life-form?arrow_forwardApproximately 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.arrow_forwardDefine biodiversity.arrow_forward
- If life is based on information, what is that information?arrow_forwardHow Do We know? The evidence is overwhelming in support of the idea that the Grand Canyon was dug over a span of millions of years by the erosive power of the Colorado River and its tributary streams. Is that a catastrophic theory or an evolutionary theory?arrow_forward5. A fossil contains 50% of the carbon-14 it once had as a living creature. Use the half-life decay equation to determine when the creature died. The half-life of carbon-14 is 5730 years.arrow_forward
- 3. The Duggs find the skeleton of a Zillow beast and wish to carbon date it. If the half life of Carbon-14 is 5700 years, and we measure 60% of the original carbon, how old is the Zillow beast fossil?arrow_forwardQUESTION 1 You are reading the results of a motility test tube that was incubated for 48 hours at 37 C. You look at the tube and see a red diffused color radiating away from the inoculation line. How would you interpret these results? OA. No growth. B. No motility. OC. Motility. OD. It is a mixed culture. QUESTION 2 You are trying to determine if a bacterial isolate is motile. What tool should you use to inoculate the motility test agar tube? OA Inoculating loop OB. Sterile swab OC. Inoculating needle OD. Sterile wooden stickarrow_forwardSource A has a half-life of 10 million years, and source B has a half-life of 5 million years. After 10 million years, what percent of each source remains? A. 50% of source A and 25% of source B B. 50% of source A and 0% of source B C. 25% of source A and 25% of source B D. 25% of source A and 0% of source Barrow_forward
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