Answered: Two closely-related species overlap at…

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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Question

Two closely-related species overlap at the southern edge of the range for species A, and the northern edge of the range for species B. Both species consume the same prey, but differ in their preferred prey size. Researchers collected individuals from the part of each species’ range where they do not overlap. They compared the consumption of prey across a range of prey sizes for these individuals in experiments where they were grown alone (solid lines) and compared this to when the species were grown together (dashed lines). Their results are in the attached figure.

Part A

How does the mean size of prey consumed changes for species A when together

a) increase

b) decrease

c) stay the same

Part B

How does the range of prey sizes consumed change for species B when together with species A?

a) increase

b) decrease

c) stay the same

Part C

Which species is the stronger competitior and why?

Proportion of Individuals
Consuming Each Prey Size
0.0-
0
T
2 4
x
6
8 10 12 14 16 18 20 22 24 26 28 30
Prey Size
species
A
B
treatment
alone
together

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