Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 20, Problem 5RQ
Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem?
a. biomassification
b. biomagnification
c. bioentropy
d. heterotrophy
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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW). If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Chapter 20 Solutions
Concepts of Biology
Ch. 20 - Figure 20.12 Which of the following statements...Ch. 20 - Figure 20.28 In which of the following regions...Ch. 20 - Decomposers are associated with which class of...Ch. 20 - The producer in an ocean grazing food web is...Ch. 20 - Which term describes the process whereby toxic...Ch. 20 - The majority of the water found on Earth is: a....Ch. 20 - The process whereby oxygen is depleted by the...Ch. 20 - Which of the following biomes is characterized by...Ch. 20 - Which of the following biomes is characterized by...Ch. 20 - Why is the tundra treeless? a. lack of sufficient...
Ch. 20 - Where would you expect to find the most...Ch. 20 - A key feature of estuaries is a. low light...Ch. 20 - Compare grazing and detrital food webs. Why would...Ch. 20 - Why are drinking water supplies still a major...Ch. 20 - The extremely low precipitation of subtropical...Ch. 20 - In what ways are the subtropical desert and the...Ch. 20 - Describe the conditions and challenges facing...
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