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Two extant (i.e., currently living) elephant species, X and Y, are placed in the genus Loxodonta, and a third elephant species, Z, is placed in the genus Elephas. Therefore, which statement should be true? O Species X is more closely related to species Z than it is to species Y. O Species X and Y share a greater number of morphological and/or genetic similarities with each other than either does with species Z. O Species X and Y evolved their "elephantness" independently of species Z (i.e., convergent evolution). O The presence of a trunk (a greatly elongated nose) is a useful characteristic to distinguish between species X, Y, and Z. O The common ancestor for all three species must be extant.

Two extant (i.e., currently living) elephant species, X and Y, are placed in the genus Loxodonta, and a third elephant species, Z, is placed in the genus Elephas. Therefore, which statement should be true? O Species X is more closely related to species Z than it is to species Y. O Species X and Y share a greater number of morphological and/or genetic similarities with each other than either does with species Z. O Species X and Y evolved their "elephantness" independently of species Z (i.e., convergent evolution). O The presence of a trunk (a greatly elongated nose) is a useful characteristic to distinguish between species X, Y, and Z. O The common ancestor for all three species must be extant.

Human Anatomy & Physiology (11th Edition)
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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Two extant (i.e., currently living) elephant species, X and Y, are placed in the genus *Loxodonta*, and a third elephant species, Z, is placed in the genus *Elephas*. Therefore, which statement should be true? - ○ Species X is more closely related to species Z than it is to species Y. - ○ Species X and Y share a greater number of morphological and/or genetic similarities with each other than either does with species Z. - ○ Species X and Y evolved their "elephantness" independently of species Z (i.e., convergent evolution). - ○ The presence of a trunk (a greatly elongated nose) is a useful characteristic to distinguish between species X, Y, and Z. - ○ The common ancestor for all three species must be extant.
Transcribed Image Text:Two extant (i.e., currently living) elephant species, X and Y, are placed in the genus *Loxodonta*, and a third elephant species, Z, is placed in the genus *Elephas*. Therefore, which statement should be true? - ○ Species X is more closely related to species Z than it is to species Y. - ○ Species X and Y share a greater number of morphological and/or genetic similarities with each other than either does with species Z. - ○ Species X and Y evolved their "elephantness" independently of species Z (i.e., convergent evolution). - ○ The presence of a trunk (a greatly elongated nose) is a useful characteristic to distinguish between species X, Y, and Z. - ○ The common ancestor for all three species must be extant.
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