Answered: two species of bateria, A and B, live…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter17: Processes Of Evolution

Section: Chapter Questions

Problem 8SA: Which of the following is not part of how we define a species? a. Its individuals appear different...

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two species of bateria, A and B, live in the gut of fruit flies. Bacteria species A benefits by receiving food from the fly and aids the fly by helping its digestion. Bacteria species B benefits by receiving food from the fly and harms the fly by attacking cells in the lining of the gut. Which of the following statements characterizes these relationships?

a. Species A is a symbiont and mutualist, while species B is not a symbiont and is a parasite.

b. both species are both symbionts and parasites

c. species A is a symbiont and species B is a parasite

d. both species are symbionts. species A is a mutualist and species B is a parasite

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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