EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 27.7, Problem 3CC
Summary Introduction
To predict:
In what way the gene flow, genetic drift, and extinction risk would differ between the original and the remnant populations.
Concept introduction:
Gene flow is the transfer of genes or alleles from one population to another.
Genetic drift is the change in allele frequency of a population due to chance events. It is more likely to occur in a small population than a larger population. It decreases the genetic variability of a population.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Question:
Think and research the effects of humans' buildings structures, communities, etc. on undeveloped land. Particularly, look at natural species in Texas, as well as the physical environment.
上午11:08 1月22日周六
* 100%
•..
Low
High
Population Density
Site A
Site B
Unfragmented
Fragmented
85. The graph above shows how seed production in a plant
species varied with population density in an unfrag-
mented habitat (site A) and in a fragmented habitat
(site B). Which of the following conclusions is best
supported by the data?
(A) There is no relationship between seed production
and habitat fragmentation.
(B) Seed production is higher in dense populations.
(C) Seed production is lower in dense populations.
(D) Habitat fragmentation has more effect on seed
production than does population density.
(E) Pollinators are either less abundant or less
effective in small populations.
Seed Production
Q10. An ecologist wants to know if diversity in a forest system is likely to decrease when an invasive species
is introduced. This invasive species is a fast-growing annual plant that grows on oak trees and kills them.
The invasive species can only survive on living oak trees. The ecologist has the original model from this lab
and another version of the model which includes transitions that involve the invasive species.
To answer the research question, the ecologist should compare species diversity generated by the original
model to diversity generated by which model described below?
A model in which oak has a positive transition rate to the invasive and the invasive has a positive transition to
grass.
A model in which oak has a positive transition rate to the invasive and the invasive has a positive transition to
oak.
A model in which the invasive has a positive transition rate to oak and oak has a positive transition to grass.
Chapter 27 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 27.1 - Prob. 1CCCh. 27.1 - Prob. 2CCCh. 27.2 - What is the Cambrian explosion? Why is it...Ch. 27.2 - Prob. 2CCCh. 27.3 - Prob. 1CCCh. 27.3 - WHAT IF? Would it be accurate to describe the...Ch. 27.4 - Prob. 1CCCh. 27.4 - Describe two key adaptations of aquatic...Ch. 27.4 - MAKE CONNECTIONS The radiation of bilaterians in...Ch. 27.5 - Describe two adaptations that have enabled insects...
Ch. 27.5 - MAKE CONNECTIONS Compare and contrast how the...Ch. 27.6 - Describe three key amniote adaptations for life on...Ch. 27.6 - Prob. 2CCCh. 27.6 - WHAT IF? Which came first, the chicken or the egg?...Ch. 27.7 - Describe how ocean communities changed in the...Ch. 27.7 - Prob. 2CCCh. 27.7 - Prob. 3CCCh. 27 - Prob. 1TYUCh. 27 - Fossil steroid and molecular clock evidence...Ch. 27 - Which of the following was probably the least...Ch. 27 - Prob. 4TYUCh. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - FOCUS ON EVOLUTION In Figure 27.29, circle the...Ch. 27 - FOCUS ON ORGANIZATION Early tetrapods had a...Ch. 27 - SYNTHESIZE YOUR KNOWLEDGE Collectively, do these...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Asap explain wellarrow_forwardNeed help with 2 and 3 ASAP :)arrow_forwardMAke ConneCtIonS Suppose that a sudden changein environmental conditions caused a substantial dropin a population’s carrying capacity. Predict how naturalselection and genetic drift might affect this population.(See Concept 23.3.)arrow_forward
- Based on Q10 (image), what are potential problems (or limitations) with basing the choice of grassland patches to be prioritised for conservation based only on the concepts described by island biogeography (only use image as reference for question)arrow_forwardQuestion: The figure below shows the relative abundance (y axis) of shrubs in an ecosystem in the years following a fire (x axis). The shrubs in this ecosystem fall into two functional groups: fire recruiters and fire persisters. If fire frequency increased significantly in this ecosystem, which group would be benefited? Choose one of the option below A- Both functional groups would benefit equally B- Fire persister species C- Fire recruiter speciesarrow_forward25. Scenario 3: In the Galapagos islands, a community of plants produced large tough seeds and small soft seeds. Most members of a population of finches are found to have small beaks while a smaller portion of the group have large beaks. The islands experienced a drought that negatively impacted the community of plants that produced small soft seeds leaving the island with plants that produced large tough seeds. After the drought, it was observed that the finches with smaller beaks were reduced and the majority of finches were found to have large beaks. Stabilizing Selection Disruptive Selection Directional Selection Normal Selection A. B. C. D. e Education TM, Inc.arrow_forward
- Q7. In a community with 200 species, under which conditions would Simpson's diversity index have the highest value? 10 species have very large populations, and 190 species are present but with very small populations. 100 species have about equal population sizes, and 100 species are very rare. O All 200 species have roughly equal population sizes. All three communities would have the same value for Simpson's diversity index.arrow_forwardNeed helparrow_forwardASAP , explain also...arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY