Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 43.3, Problem 2R
Summary Introduction
To review:
The mechanism by which Spemann-Mangold experiments used the criteria of necessity and sufficiency to show the role of the dorsal lip of blastopore as primary organizer.
Introduction:
Hans Spemann and his student Hilde Mangold conducted an experiment to understand the induction in embryonic development of amphibians. It led to the discovery of dorsal lip of the blastopore as the primary embryonic organizer.
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Which of the following is true about cleavage in C. elegans. Choose all possible answers.
a) Exhibit a rotational holoblastic cleavage
b) During the second division, the dorsal-ventral axis is determined.
c) Cells are enveloped to an egg membrane called a chorion.
d)
Each of symmetric division process one differentiated descendant.
e) At the transition between the 2 and 4-cell stages, the right-left axis can be seen.
Which of the following is not
Counting
b-Fooding
e-Freezing
d-Media preparation
e-Thawing
7- Which of the following questions is not of
a-How do developmental errors arise?
b-How do cells communicate with each other?
e-How do germ cells created during development?
d-What mechanisms of developmental control exist?
e-How does the zygote acquire the complex shape of the adult organism?
of the fundamental experiments in developmental
8- Which of the following experiment
history?
a-Roux's frog egg experiment
b-Meselson and Stahl experiment
e-Malpighi's drawing of chick embryo
d-Sea urchin embryos by Driesch
e-August Weismann's Theory of Nuclear Determinants experiment
Please please please solve the question in less than half an hour
How did the organizer get its properties? What caused the dorsal blastoporelip to differ from any other region of the embryo?
Chapter 43 Solutions
Life: The Science of Biology
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