Toucans present Toucans absent 30- 80- 25- 20- 15- 10- 60- 40- 5- 20- 0- 8. 8 10 12 14 10 12 14 Seed diameter (mm) Number of seeds

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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a.Toucans can eat fruits with large seeds because their large bills can open very wide. Most other birds in the same forest can only eat small seeds. Ecologist Mauro Galetti and his colleagues measured the seed sizes of palms in forest fragments with and without toucans. The graphs show two of the forest populations they studied. What is the take-home message of the data?

b.Large seeds carry more resources than small seeds and tend to have a higher rate of survival, especially after being dispersed by a bird. Predict how the local extinction of toucans will affect the palm population over time.

 

Toucans present
Toucans absent
30
25-
80-
20-
60-
15-
40-
10-
20-
5-
8
10
12
14
8
10
12
14
Seed diameter (mm)
Number of seeds
Transcribed Image Text:Toucans present Toucans absent 30 25- 80- 20- 60- 15- 40- 10- 20- 5- 8 10 12 14 8 10 12 14 Seed diameter (mm) Number of seeds
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