Biology with Connect Access Card
10th Edition
ISBN: 9780077705701
Author: Raven, Peter
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 26, Problem 2A
Although we do not know how early life arose, the following likely happened:
a. All organic molecules were transported to Earth by meteors.
b. High levels of oxygen were essential for glycolysis.
c. Lipids organized to form cell membranes.
d. Organic molecules formed once temperatures reached moderate levels, equivalent to today’s environment.
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Direct evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion years ago. But how did the first living cells appear?
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A. Although Mars's soil is chemically active, it does not contain obviously active micro-organisms.
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D. Although there does not appear to be life on Mars today, the soil is full of microscopic fossils.
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
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Chapter 26 Solutions
Biology with Connect Access Card
Ch. 26 - The Miller-Urey experiment demonstrated that a....Ch. 26 - Plate tectonics can contribute to a. volcanoes and...Ch. 26 - Identify which of the following statements is...Ch. 26 - Which of the following events occurred first in...Ch. 26 - Prob. 5UCh. 26 - A global glaciation would be unlikely to occur if...Ch. 26 - Although we do not know how early life arose, the...Ch. 26 - Which bits of evidence would convince you that...Ch. 26 - During which tunes would you expect that...Ch. 26 - The chloroplasts of brown algae a. have a...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2) appearance of photosynthetic organisms, (3) appearance and increase of O2 in the atmosphere, (4) self-replicating RNA developsa. 4, 2, 3, 1b. 2, 3, 1, 4c. 3, 1, 4, 2d. 1, 2, 4, 3arrow_forwardWhich 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_forwardDuring the first 600 million years of Earth history, enzymes, ATP , and other molecules could have assembled spontaneously at the same locations. Which probable stage of physical and chemical evolution of life is that?arrow_forward
- Describe how scientists have tested the hypothesis that simpleorganic molecules could have formed on the early Eartharrow_forwardwhat simple organic molecules were likely the precursors of life? a. water and proteins b. amino acids and nucleotides c. oxygen and carbon d. prokaryotes and eukaryotesarrow_forwardWhich of the following statements supports the concept of the endosymbiotic theory? A. Proteins may be trafficked within the endomembrane system. B. Ribosomes are present in the cytoplasm of prokaryotic cells and eukaryotic cells. C. Chloroplasts have many features in common with bacteria. D. Mitochondria can fuse together to form larger organelles within eukaryotic cells.arrow_forward
- The first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaursarrow_forwardFrom the different types of monomeric building blocks of life which category is not covalently linked together into huge polymeric structures? a.) amino acids b.) nucleic acids c.) fatty acids d.) carbohydratesarrow_forwardName three different sources of energy that could have powered reactions on early earth to form organic compounds.arrow_forward
- Stanley Miller’s classic experiment suggests that ______ ______ of organic compounds may have been the basis of cellular life. a. abiotic synthesis b. biotic synthesis c. spontaneous animation d. extraterrestrial deliveryarrow_forwardWhat did the Miller-Urey experiment demonstrate? A. Life originated in outer space and was brought to Earth on a meteor. B. Complex molecules can be formed from water, carbon dioxide, methane, ammonia, and hydrogen gas in a reducing atmosphere. C. Eukaryotic cells evolved from prokaryotic cells following an endosymbiotic event. D. RNA was the genetic storage merial before DNA.arrow_forwardSummarize the theories on how life on Earth began A. Inorganic molecule form organic molecules. B. Organic molecules form comets.arrow_forward
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