BIOLOGY:DYNAMIC SCIENCE-ACCESS >CUSTOM<
4th Edition
ISBN: 9781337254175
Author: Russell
Publisher: CENGAGE C
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Chapter 50, Problem 11TYK
Discuss Concepts Experimentally, it is possible to divide an amphibian egg so that the gray crescent is wholly within one of the two cells formed. If the two cells are separated, only the cell with the gray crescent will form an embryo with a long axis, notochord, nerve cord, and back musculature. The other forms a shapeless mass of immature gut and blood cells. Propose an explanation for these outcomes.
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Scientists compare the structures of a chicken embryo and a human embryo at the same stage of development. They find that both vertebrates have similar shapes and structures, including the presence of gill slits and tails. How is this comparison of the embryos used as supporting evidence of evolution?
A. The similarities suggest that chickens and humans are the direct descendants of modern day fish with tails and gill slits.
B. The similarities suggest that vertebrates passthrough each of the adult stages of their evoluntionary history as they develop.
C. The similarities suggest that vertebrates can undergo genetic changes during development that lead to the evolution of new species
D. The similarities suggest that chickens and humans descend from ancestors with genes that code for the development of tails and gill slits
How can evolutionary relationships among organisms be determined by comparing embryonic development?
A. Embryos of fish and mammals share no similarities
B. Embryos retrace their ancestral stages during embryonic development
C. Embryos of more closely related organisms show greater similarities in development
D. Embryos that develop inside eggs lack similarities to placental mammals
Which of the following is the correct order for the four developmental phases in animals?
A. Segmentation of the body
B. Determination
C. Cell differentiation
D. Formation of body axes
a. A, B, C, D
b. A, D, C, B
c. D, A, B, C
d. D, A, C, B
Chapter 50 Solutions
BIOLOGY:DYNAMIC SCIENCE-ACCESS >CUSTOM<
Ch. 50.1 - Prob. 1SBCh. 50.1 - Prob. 2SBCh. 50.2 - Prob. 1SBCh. 50.2 - Prob. 2SBCh. 50.2 - Prob. 3SBCh. 50.3 - Prob. 1SBCh. 50.3 - Prob. 2SBCh. 50.4 - Prob. 1SBCh. 50.4 - Prob. 2SBCh. 50.5 - Prob. 1SB
Ch. 50.5 - Prob. 2SBCh. 50.5 - Prob. 3SBCh. 50 - Prob. 1TYKCh. 50 - Prob. 2TYKCh. 50 - Prob. 3TYKCh. 50 - Prob. 4TYKCh. 50 - Prob. 5TYKCh. 50 - Prob. 6TYKCh. 50 - Prob. 7TYKCh. 50 - In the development of the female sex organs: a....Ch. 50 - In the embryonic development of the eye: a. the...Ch. 50 - Prob. 10TYKCh. 50 - Discuss Concepts Experimentally, it is possible to...Ch. 50 - Discuss Concepts Developmental biologist Lewis...Ch. 50 - Discuss Concepts Arguably, in sexually reproducing...Ch. 50 - Prob. 14TYKCh. 50 - Prob. 15TYKCh. 50 - Prob. 16TYKCh. 50 - Prob. 1ITDCh. 50 - Prob. 2ITDCh. 50 - Prob. 3ITDCh. 50 - Prob. 4ITD
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