Homework Help is Here – Start Your Trial Now!
Science
Biology
erald ash borer, a beetle whose larvae live and feed unde lly kill-off the tree by girdling it while feeding, is decimatir a to high densities experience particularly high attack rate tely, while isolated individual ash trees that have no ash n sed by the ash borer and survive. rely on external fertilization when gametes (sperm and eg! uantities and have to meet at random chance. When coral ing and die back, external fertilization becomes inefficient, ations further decline or go extinct.

erald ash borer, a beetle whose larvae live and feed unde lly kill-off the tree by girdling it while feeding, is decimatir a to high densities experience particularly high attack rate tely, while isolated individual ash trees that have no ash n sed by the ash borer and survive. rely on external fertilization when gametes (sperm and eg! uantities and have to meet at random chance. When coral ing and die back, external fertilization becomes inefficient, ations further decline or go extinct.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
See similar textbooks
icon
Related questions
Question

Please just choose correct answer

Which of these following scenarios is caused by the Allee effect? O The chytrid fungus devastates Amphibian populations world-wide. Smaller populations are more likely to be extirpated when the pathogen is introduced, because they have less genetic variability and therefore a smaller likelihood to have individuals that are naturally resistant to the fungus. After a big disturbance in forests, such as fire, many seeds germinate and seedlings compete for space, light and resources. K-selected species produce fewer, but larger seeds that are initially outnumbered by the numerous seeds and resulting seedlings of r-selected species. The initial advantage of r-selected species of occupying more locations and therefore by random chance also better locations, is later overcome by the K-selected species' higher competitive ability. Therefore, for the first years to decades, r-selected species dominate areas that experienced severe disturbances, while in mature forests, K-selected species dominate. O The emerald ash borer, a beetle whose larvae live and feed under the bark of ash trees and eventually kill-off the tree by girdling it while feeding, is decimating ash trees. Ash trees occurring in medium to high densities experience particularly high attack rates and are likely to be wiped out completely, while isolated individual ash trees that have no ash neighbors have a higher chance to be missed by the ash borer and survive. Corals rely on external fertilization when gametes (sperm and eggs) are released into the sea in large quantities and have to meet at random chance. When coral densities drop due to coral bleaching and die back, external fertilization becomes inefficient, few zygotes form, and coral populations further decline or go extinct.
Transcribed Image Text:Which of these following scenarios is caused by the Allee effect? O The chytrid fungus devastates Amphibian populations world-wide. Smaller populations are more likely to be extirpated when the pathogen is introduced, because they have less genetic variability and therefore a smaller likelihood to have individuals that are naturally resistant to the fungus. After a big disturbance in forests, such as fire, many seeds germinate and seedlings compete for space, light and resources. K-selected species produce fewer, but larger seeds that are initially outnumbered by the numerous seeds and resulting seedlings of r-selected species. The initial advantage of r-selected species of occupying more locations and therefore by random chance also better locations, is later overcome by the K-selected species' higher competitive ability. Therefore, for the first years to decades, r-selected species dominate areas that experienced severe disturbances, while in mature forests, K-selected species dominate. O The emerald ash borer, a beetle whose larvae live and feed under the bark of ash trees and eventually kill-off the tree by girdling it while feeding, is decimating ash trees. Ash trees occurring in medium to high densities experience particularly high attack rates and are likely to be wiped out completely, while isolated individual ash trees that have no ash neighbors have a higher chance to be missed by the ash borer and survive. Corals rely on external fertilization when gametes (sperm and eggs) are released into the sea in large quantities and have to meet at random chance. When coral densities drop due to coral bleaching and die back, external fertilization becomes inefficient, few zygotes form, and coral populations further decline or go extinct.
Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Substance abuse
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.
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education
SEE MORE TEXTBOOKS