The Greater prairie chicken population in Illinois is a living example of which of these ?

Question

BlackTom AI · Accepted Answer

Habitat fragmentation and genetic deterioration are central concepts: the Illinois greater prairie chicken illustrates habitat loss reducing range and population size, a genetic bottleneck, loss of alleles causing reduced reproductive success, and recovery attempts by bringing in outsiders to restore gene flow.

1) Relevant knowledge points and concepts
- Habitat loss/fragmentation reduces population size and geographic range, lowering genetic diversity.
- A population bottleneck is a severe reduction in numbers that causes loss of alleles and drift.
- Loss of alleles and increased inbreeding can cause inbreeding depression (e.g., reduced egg hatch rates).
- Gene flow (translocation/introduction of individuals) can restore genetic variation and improve fitness.

2) Step-by-step reasoning
- Historical maps show the greater prairie chicken occupied most of Illinois in 1820 but by 1993 persisted only in small isolated patches. This documents severe habitat loss and range contraction (supports A).
- The dramatic reduction to a few small populations constitutes a bottleneck: few breeding individuals survived, producing a founder/bottleneck effect and loss of allelic diversity (supports B).
- Empirical studies of these prairie chickens documented reduced hatch rates and other fitness declines linked to loss of genetic variation and inbreeding, demonstrating allele loss → reduced hatch success (supports C).
- Conservation actions involved translocating individuals from distant populations to Illinois to increase heterozygosity and hatch rates; this is reestablishment of gene flow by introduction (supports D).

3) Calculations
- No numerical calculations are required; the maps and documented outcomes provide qualitative evidence.

4) Why the correct answer is correct
Because each individual option (A–D) is a documented aspect of the Illinois greater prairie chicken story, the single best choice that encompasses all observed phenomena is "All of these."

5) Why other options are incorrect
- Choosing only A, B, C, or D would omit documented parts of the case. F ("None of these") contradicts well-documented evidence and is incorrect.

Conclusion: All listed statements (A–D) correctly describe aspects of the Illinois greater prairie chicken case; therefore the correct answer is E) All of these, matching the provided answer.

The Greater prairie chicken population in Illinois is a living example of which of these ?单项选择题

类似问题

Which of the following is a factor that, by itself, is least likely to promote widespread changes in allele or genotype frequencies in a large population?

A population geneticist is studying a population of pea aphids and wants to determine whether the proportion p of aphids that are resistant to a particular insecticide is less than 0.40, the proportion reported in a previous study. Which pair of hypotheses is appropriate for this test?

In natural populations, most genes are

Which of the following is a factor that does not promote widespread changes in allele or genotype frequencies?

A population that is infinitely large and in which mating is completely random is mostly likely to:

Question at position 21 What is the most important determinant of genetic differences between populations of humans across the world?RaceEthnicityGeographic distanceLocal adaptationClear my selection

Question at position 14 Genetic diversity amongst human populations is best explained by __________.cultural differencespopulation sizeethnicityracial categorizesgeographic distanceClear my selection

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单