EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 4.4, Problem 2R
Summary Introduction
To review:
The evidence to prove that the cells existed 3 BYA (billion years ago).
Introduction:
The formation of proto-cells had a basic requirement of the cell membrane in order to have a boundary between cell’s inner chemical space and outer environment. These cell membranes provide a means for a cell to undergo various biochemical reactions in order to survive. The traces of
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EBK LIFE: THE SCIENCE OF BIOLOGY
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- i need the answer quicklyarrow_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_forwardWhat is the most logical theory on the topic of the Origin of Life?arrow_forward
- How would you describe earth of millions year agoarrow_forwardOne of the simplest definitions of a life-form is anything with the capacity to reproduce and regulate itself. Before life began, the complex organic, or hydrocarbon-bearing, molecules that makeup RNA and DNA, the building blocks of life, must have formed. No one knows exactly how life is formed from these molecules, but many ideas have been put forward. As you enter this area, go toward the large video screen on the right and explore the “Life at the hydrothermal Vents” label deck. Some scientists theorize that life begins at deep-sea vents. Find three lines of evidence to support this claim.arrow_forwardHere is the question: What was the likely source of the raw material incorporated into the first life forms? I believe it is carbon, but I don't know why it is carbon. What I mean is, why is carbon considered the thing that makes something alive? Why are eukaryotes and prokaryotes simply considered alive just because they have carbon. Would that mean that carbon is alive because carbon has carbon? I would appreciate an anwser because I'm really trying to understand everything I run across. I love educating myself and I'm on a quest for knowledge. Thanks guys!arrow_forward
- What evidence would you look for on Enceladus, Europa or Mars that would tell you that life may have existed there in the past?arrow_forward“Life has profoundly changed the Earth.” Explain whether or notthese experimental results support this statement.arrow_forwardthe landmark experiment by Miller and Urey, and various repeats of this experiment, did not successfully recreate life itself, but why do we consider the results from this experiment as support for the origin of life on Earth?arrow_forward
- Why do scientists think that all forms of life on earthhave a common origin?arrow_forwardIf living cells were produced in a test tube from nonbiological components by chemical processes, would this accomplishment prove that life evolved in asimilar manner billions of years ago? Explain your answer.arrow_forwardPlease, need help with the explanation of the answer: During Chemical Evolution, what would one expect to find inside the protocell? a) Water mixed with many non-polar molecules. b) Fatty Acids mixed with non-polar molecules. c) a wide variety of different ionic and polar covalent molecules dissolved in water. d) Functioning proteins. E) Living single-celled organismsarrow_forward
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Fossil: The Language & History of Paleontology; Author: Alliterative;https://www.youtube.com/watch?v=x9yNwRBlKtU;License: Standard youtube license