Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 25, Problem 3TYK
Summary Introduction
Introduction: All forms of life are present on the Earth. The Earth was formed about 4.6 billion years ago. Until 4 billion years ago, the Earth was bombarded by ice and huge rocks. The planet undergoes changes depending on the life that inhabits.
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Which of the following did Stanley miller place in the experimental system to show that organic monomers could have risen from inorganic molecules on the early Earth?
A. Only RNA
B. Microspheres
C. Purines and pyrimidines
D. All of these are correct
Which of the following represent issues of great uncertainty regarding early Earth?
Choose one or more:
✓ A. whether early life forms were thermophiles or psychrophiles
B. whether first life was prokaryotic or eukaryotic
C. whether life evolved here or was of extraplanetary origin
D. whether first organisms were aerobes or anaerobes
O E. role of methanogens and atmospheric methane
Scientists think that terrestrial life probably originated in Earth's oceans becauseChoose one:
A. energy was available there.
B. all of the chemical pieces were there.
C. All of the possible answers are correct.
D. the earliest evidence for life on Earth comes in ocean-dwelling forms.
Chapter 25 Solutions
Study Guide for Campbell Biology
Ch. 25 - Why do we say that, for life to have begun, the...Ch. 25 - Prob. 2IQCh. 25 - Prob. 3IQCh. 25 - Prob. 4IQCh. 25 - Prob. 5IQCh. 25 - a. Mammals originated 180 mya but did not change...Ch. 25 - Prob. 7IQCh. 25 - a. According to the model of species selection,...Ch. 25 - Prob. 1SYKCh. 25 - Label the eons, eras, and key events shown on the...
Ch. 25 - Describe three major processes that have...Ch. 25 - Prob. 4SYKCh. 25 - The primitive atmosphere of Earth may have favored...Ch. 25 - Prob. 2TYKCh. 25 - Prob. 3TYKCh. 25 - The half-life of carbon-14 is 5,730 years. A...Ch. 25 - Prob. 5TYKCh. 25 - Prob. 6TYKCh. 25 - Prob. 7TYKCh. 25 - Look back at the Geologic Record in Table 25.1....Ch. 25 - Prob. 9TYKCh. 25 - According to the endosymbiont theory, a. the first...Ch. 25 - Prob. 11TYKCh. 25 - Prob. 12TYKCh. 25 - Prob. 13TYKCh. 25 - Prob. 14TYKCh. 25 - Prob. 15TYKCh. 25 - Prob. 16TYKCh. 25 - Prob. 17TYKCh. 25 - What is meant by the concept of species selection?...
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- Martian meteorites found in Antarctica were determined to possibly contain life. Scientists looked skeptically at these meteorites because a. their results suggest unusual chemical signatures that do not indicate life. b. features thought to be Martian fossils could be nonbiochemical formations. c. it is impossible for a piece of the Martian surface to fall to Earth. d. both a and b are true.arrow_forwardAll the following statements support the theory that similar organisms have a common ancestor except Select one: a. similar DNA patterns occur in closely related organisms b. organisms sharing a habitat tend to develop similar behaviours c. transitional fossils show links between groups of organisms d. groups of organisms display similar embryonic developmentarrow_forwardWhich of the following is the last step in the Oparin-Haldane Model for the beginning of life? a. Membranes form around the first cells b. Simple molecules assembled into building blocks c. Polymers assembled from simple building blocks d. Asteroids and meteors provide building blocks for life on eartharrow_forward
- Which of these did Stanley Miller place in his experimental systemto show that organic molecules could have arisen from inorganicmolecules on the early Earth?a. microspheresb. purines and pyrimidinesc. gases found in the atmosphere of early Earthd. only RNAe. All of these are correct.arrow_forwardWhich of the following theories as regards the origin of life on earth is accepted today? A. Theory of spontaneous generation B. Theory of special creation C. Cosmozoic theory D. Theory of abiogenesisarrow_forwardWhich of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energyarrow_forward
- What is meant by the term fossil fuel? a. In order to obtain energy from these fuels, a technique known as fossilization must be used. b. The fuel was formed from ancient plant and animal life, representations of which are sometimes found as fossil imprints. C. The fuel itself must be taken from older rock samples that frequently contain embedded fossil remains. 7.arrow_forwardWhich of the following steps has not yet been accomplished byscientists studying the origin of life?(A) synthesis of small RNA polymers by ribozymes(B) formation of molecular aggregates with selectivelypermeable membranes(C) formation of protocells that use DNA to direct thepolymerization of amino acids(D) abiotic synthesis of organic moleculesarrow_forwardThe Miller-Urey experiment simulated compounds present in the atmosphere of early Earth, lightning, and the evaporation and condensation of atmospheric water. What other information about the conditions on Earth during this time period would you want to know to improve the experimentarrow_forward
- The Miller experiment consisted of various gases, believed to have been present in the early atmosphere of Earth, exposed to an electrical arc. This experiment resulted in a. nothing. b. carbon dioxide gas and water vapor. c. amino acids. d. rain.arrow_forwardWhich of the following would be the most likely place that life would first form on Earth?Choose one: A. mountaintops B. within the atmosphere C. anywhere D. on the surface at the lowest elevations E. deep under waterarrow_forwardWhich of the following describes the organisms and/or processes that were most influential in the creation of early Earth ecosystems? a. Extinction of animals and domination of plants b. Build up the greenhouse gas carbon dioxide c. Prokaryotic production of an oxygen rich environment d. Eukaryotic growtharrow_forward
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