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What can be concluded from the following graph?

The graph below shows the changes in the size of the populations of two different species of paramecia placed in one beaker.





A. Paramecium A is the predator, paramecium B is the prey
B. Paramecium B is the predator, paramecium A is the prey
C. The introduction of paramecium B is followed by a decline in the population of paramecium A
D. Paramecium B reaches a steady state of growth
E. Paramecium A reaches a steady state of growth

This question is part of Quiz: Ecosystems
Asked by Wyatt Williams, Last updated: Sep 19, 2020

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2 Answers

Markda John

Markda John

Markda John
Markda John

Answered Apr 02, 2018

This graph shows that paramecium B is the predator, and paramecium A is the prey. So, to figure this out, you have to look at two things: the populations, and when each paramecium was introduced to the beaker. Paramecium A is introduced at day 0. There’s a huge peak in the population of this paramecium over the next two days. Paramecium B is added on day 2.

Paramecium A’s population plummets over the next three days as paramecium B’s population slowly grows. By day 5, there’s no paramecium A left. Paramecium B survives for another day and a half before dying off. The only way this kind of graph could come around would be if paramecium B is eating paramecium A.

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Wyatt Williams

Wyatt Williams

Wyatt Williams
Wyatt Williams

Answered Oct 10, 2017

The introduction of paramecium B is followed by a decline in the population of paramecium A
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