Answered: Population growth rate of aphid (r) 0.2…

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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Aphids and ants can have a mutualistic relationship. Aphids exude sugary substances that provide energy for ants and ants can defend aphid colonies from predators. This experiment measured the population growth rate of aphids vs the number of aphids at the start of the experiment on plants where ants were present or absent. Please select all the statements that are reasonable interpretations of this graph. Select all that apply.

A. When starting populations are low, the presence of ants does not matter. Their importance increases with higher starting population densities.

B. It appears that aphid populations founded with 12 individuals grow faster than aphid populations founded with 24 individuals when compared to each other in the same ant treatment..

C. none of the above.

D. The growth of rate of aphid populations was significantly higher when tended by ants than aphid population that were not tended

E. Ants seem to be necessary for small founding populations of aphids to grow and less necessary for larger founding populations in this experiment.

Population growth rate of aphid (r)
0.2
0.18
0.16
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
a
d
a
H
b
12
Initial aphid density
ant presence
☐ant absence
24
с

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