LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
11th Edition
ISBN: 9781319209957
Author: Sadava
Publisher: MAC HIGHER
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Chapter 24, Problem 3Q
Summary Introduction
To review:
The factors that resulted in the extinction of Ediacaran biota and the rise of the Cambrian type biota.
Introduction:
Ediacaran fossils are the strata formed by organisms found in the Ediacaran period. This period lasted from about 635 million years to 542 million years ago. Ediacaran strata are unique collection of soft-bodied organisms, mostly sessile organisms that are conserved worldwide as fossil impressions in this Ediacaran period.
The Cambrian period is the period of ancient life that lasted about 53 million years ago and it is known for dramatic evolutionary changes in life on the earth. Cambrian period faced Cambrian explosion that saw the diversity of life typically major animal groups alive today. The animal group majorly contains chordates, vertebrates such as humans.
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Respond to the following in a minimum of 175 words:
How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients?
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Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.
You are studying the effect of directional selection on body height in three
populations (graphs a, b, and c below).
(a) What is the selection differential? Show your calculation. (2 pts)
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Explain your answer. (2 pts)
(c) If you examined the offspring in the next generation in each population,
which population would have the highest mean height? Why? (2 pts)
(a)
Midoffspring height (average height of offspring)
Short
Short
Short
Short
(c)
Short
(b)
Short
Tall
Short
Tall
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Short
Tall
Midparent height
(average height of
Mean of population = 65 inches
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Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
Chapter 24 Solutions
LIFE:SCIENCE OF BIOL.(LL) >CUSTOM<
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