Recall our discussions about the assumed relationships between oxpecker birds and cattle. Initial historical observations described them as mutualists. Based on the exclusion experiments by Weeks et al. (2000), which of the following is the best explanation for the association between oxpeckers and their cow friends? 10- * 0- E -5- 1st treatment p<0.0002 2nd treatment p<0.01 1st treatment p<0.003 2nd treatment p<0.007 3rd treatment p<0.005 3rd treatment p<0.0005 -10- 1st treatment p> 0.6 2nd treatment p> 0.08 3rd treatment p> 0.07 O a. They are true mutualists because the presence of the birds is associated with increased wound size and there is no significant decline in tick infestations. O b. They are true mutualists because the birds get the majority of their food in the form of eating the ectoparasites, like ticks, off the cattle and the cattle get the benefit of a reduced parasite burden. O c. They are not true mutualists because the oxpecker birds only cause harm to the cattle and no benefit. O d. They are not true mutualists because although the birds do decrease the amount of ear wax build up which could enable better hearing, the birds also are associated with decreased wound healing.

Recall our discussions about the assumed relationships between oxpecker birds and cattle. Initial historical observations described them as mutualists. Based on the exclusion experiments by Weeks et al. (2000), which of the following is the best explanation for the association between oxpeckers and their cow friends? 10- * 0- E -5- 1st treatment p<0.0002 2nd treatment p<0.01 1st treatment p<0.003 2nd treatment p<0.007 3rd treatment p<0.005 3rd treatment p<0.0005 -10- 1st treatment p> 0.6 2nd treatment p> 0.08 3rd treatment p> 0.07 O a. They are true mutualists because the presence of the birds is associated with increased wound size and there is no significant decline in tick infestations. O b. They are true mutualists because the birds get the majority of their food in the form of eating the ectoparasites, like ticks, off the cattle and the cattle get the benefit of a reduced parasite burden. O c. They are not true mutualists because the oxpecker birds only cause harm to the cattle and no benefit. O d. They are not true mutualists because although the birds do decrease the amount of ear wax build up which could enable better hearing, the birds also are associated with decreased wound healing.

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

Chapter17: Communities And Ecosystems

Section: Chapter Questions

Problem 2CT

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