Scientists examined the interactions between bacteria and two species of protozoa, Uronema sp. and Euplotes sp., found in the bays and inlets of coastal California. An experiment was designed that modeled the ecosystem and measured the amount of bacteria and carbon that were ingested by the protozoal species, as shown in the data table. Bacteria with labeled glucose were incubated with these two species of protozoa. The number of bacteria, carbon ingested, and carbon exuded from the protozoa were then measured. Which of the following explains how the difference between ingested and exuded carbon relates to the energy in the aquatic ecosystem? Protozoa Bacteria Ingested (x107 l‒1h‒1) Bacterial Carbon Ingested (ngC l‒1h‒1) Exuded Bacterial Carbon (ngC l‒1h‒1) Uronema sp. 172.20 34,460 3,067 Euplotes sp. 50.82 10,170 305 The protozoa hydrolyzed the ingested carbon, resulting in an increase in energy within the ecosystem. The protozoa decomposed the ingested carbon, resulting in an increase in energy within the ecosystem. The protozoa hydrolyzed the ingested carbon, resulting in no net change to the energy within the ecosystem. The protozoa decomposed the ingested carbon, resulting in no net change to the energy within the ecosystem.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter4: Energy And Metabolism

Section: Chapter Questions

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Scientists examined the interactions between bacteria and two species of protozoa, Uronema sp. and Euplotes sp., found in the bays and inlets of coastal California. An experiment was designed that modeled the ecosystem and measured the amount of bacteria and carbon that were ingested by the protozoal species, as shown in the data table. Bacteria with labeled glucose were incubated with these two species of protozoa. The number of bacteria, carbon ingested, and carbon exuded from the protozoa were then measured.

Which of the following explains how the difference between ingested and exuded carbon relates to the energy in the aquatic ecosystem?

Protozoa	Bacteria Ingested (x10⁷l^‒1h^‒1)	Bacterial Carbon Ingested (ngC l^‒1h^‒1)	Exuded Bacterial Carbon (ngC l^‒1h^‒1)
Uronema sp.	172.20	34,460	3,067
Euplotes sp.	50.82	10,170	305

The protozoa hydrolyzed the ingested carbon, resulting in an increase in energy within the ecosystem.

The protozoa decomposed the ingested carbon, resulting in an increase in energy within the ecosystem.

The protozoa hydrolyzed the ingested carbon, resulting in no net change to the energy within the ecosystem.

The protozoa decomposed the ingested carbon, resulting in no net change to the energy within the ecosystem.

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