ESSENTIAL CELL BIOLOGY (LL)-TEXT
ESSENTIAL CELL BIOLOGY (LL)-TEXT
5th Edition
ISBN: 9780393680331
Author: ALBERTS
Publisher: NORTON
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 18, Problem 1Q
Summary Introduction

To explain: All present day cells have arisen by an uninterrupted series of cell divisions extending back in time to the first cell division. Strictly true or false.

Introduction: The origin of life is explained with several concepts. One such concept is that an ancestral cell gave rise to all types of organisms irrespective of prokaryotes and eukaryotes.

Expert Solution & Answer
Check Mark

Answer to Problem 1Q

Correct answer: The given statement is true.

Explanation of Solution

Several evidences indicate that all organisms came from a common ancestor. It is unlikely that the first cell that was formed became the founder cell for all the cells that are living currently. Evolution is a highly indirect process with focused development. So, there is a higher chance that several unsuccessful trials occurred and the cells replicated simultaneously. The ones that adapted to environmental conditions and competition survived and the others perished. Therefore, it can be hypothesized that one ancestral cell got fortunate enough that it got relatively adapted to the environment and stabilized itself. It is known that all cells arise from pre-existing cells. The first cell division is the division of the cell that got fortunate enough to escape the selection pressure. The cells that came thereafter went on with uninterrupted division. Some may have perished, but some continue with the cell division process. Hence, the statement is true.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
You aim to test the hypothesis that the Tbx4 and Tbx5 genes inhibit each other's expression during limb development. With access to chicken embryos and viruses capable of overexpressing Tbx4 and Tbx5, describe an experiment to investigate whether these genes suppress each other's expression in the limb buds. What results would you expect if they do repress each other? What results would you expect if they do not repress each other?
You decide to delete Fgf4 and Fgf8 specifically in the limb bud. Explain why you would not knock out these genes in the entire embryo instead.
You implant an FGF10-coated bead into the anterior flank of a chicken embryo, directly below the level of the wing bud. What is the phenotype of the resulting ectopic limb?  Briefly describe the expected expression domains of 1) Shh, 2) Tbx4, and 3) Tbx5 in the resulting ectopic limb bud.
Knowledge Booster
Background pattern image
Biology
Learn more about
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Biomolecules - Protein - Amino acids; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=ySNVPDHJ0ek;License: Standard YouTube License, CC-BY