A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

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Answer 1

Question

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

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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…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

Answer 2

Question

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Question

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Question

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

Answer 6

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.

Conclusion

The orderly progress of communities, starting from bare rock with no soil or traces of a previous community, is called primary succession.

Answer 7

Chapter 28, Problem 1MC

Summary Introduction

Introduction: A constant change during species composition in a community is called succession. Primary and secondary ways of succession share a common set of processes. Primary succession, which started with the soil loss after the volcano, determines the initial period of ecological succession.

Answer 8

Expert Solution & Answer

Answer to Problem 1MC

Correct answer: Option a. “primary succession”.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Reasons for the correct statement:

A change that occurs in an area where no previous community existed is termed as primary succession. A tangled combination of life did not start from bare rocks or naked soil, rather it develops into stage after long time, this stage is termed as succession.

Hence, option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “secondary succession”.

A change that takes place in an area, which is pre-existing or distributed somewhere but its extinction has not occurred is called secondary succession. Hence, option b. is an incorrect answer.

Option c. is given as “interspecific succession”.

This type of competition arises between different species occupying the same ecological area. Hence, option c. is an incorrect answer.

Option d. is given as “niche succession”.

The response of an organism or a population to the distribution of resources and to competitors describes the ecological niche. Hence, option d. is an incorrect answer.

Hence, options b., c., and d. are incorrect answers.