Newly studied parasite-host relationships have demonstrated the influence of and preference for sexual reproduction in antagonistic coevolving species. Evaluate the following study to answer the questions further below. COEVOLUTION H H° H' H -etc. EVOLUTION H H HI etc. O Control O Evolution O Coevolution Frozen stocks Time Figure 3. Parasite-host interaction in nematodes. Credit: From Brockhurst, M.A. 2011. Sex, death and the Red Queen. Science 333(6039): 166–167. Reprinted with permission from AAAS. In a study by Brockhurst (2011) researchers designed an experiment to evaluate how a parasite, capable of both asexual and sexual reproduction, may adapt to its host over a period of time. Using a Nematode worm host (H) and its cor- responding parasite (p), they devised two tests. First, they allowed the two species to co-evolve over numerous genera- tions of both host (H°, H', H², H') and parasite (P", P', P², P'). Then, using frozen stocks of parasite (P", P", P°, P"), they infected a new generation of the host (H°, H', H², H') to examine the one-sided evolutionary progression of the host only. The rate of sexual reproduction of the parasite was graphed for both scenarios and compared to a control. Rate of secual reproduction

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,...

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What was occurring at the spike and quick decline in the evolution graph? Base your response in the context of the
Red Queen Hypothesis (i.e., host adaptation, parasite adaptation, fitness loss, and deteriorating environment).

Newly studied parasite-host relationships have demonstrated the influence of and preference for sexual reproduction in
antagonistic coevolving species. Evaluate the following study to answer the questions further below.
COEVOLUTION
H
H°
H'
H
etc.
EVOLUTION
H
H
H'
etc.
O Control
O Evalution
O Coevolution
Frozen
Time
stocks
Figure 3. Parasite-host interaction in nematodes. Credit: From Brockhurst, M.A. 2011. Sex, death and the Red Queen. Science
333(6039): 166–167. Reprinted with permission from AAAS.
In a study by Brockhurst (2011) researchers designed an experiment to evaluate how a parasite, capable of both asexual
and sexual reproduction, may adapt to its host over a period of time. Using a Nematode worm host (H) and its cor-
responding parasite (p), they devised two tests. First, they allowed the two species to co-evolve over numerous genera-
tions of both host (H°, H', H², H®) and parasite (P", P', P², P³). Then, using frozen stocks of parasite (P, Pº, P°, P"),
they infected a new generation of the host (H°, H', H², H³) to examine the one-sided evolutionary progression of the
host only. The rate of sexual reproduction of the parasite was graphed for both scenarios and compared to a control.
Rate of secual reproduction

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

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Red Queen Hypothesis, based on evolutionary biology, states that a particular species must keep adapting and evolving continuously by passing on their genes to their next generations not only for advantage in reproduction but also to survive as the other competing species are evolving. This indicates the relationship between evolution of a single species and its coevolution with another.

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