The ancestors of extant tetrapods first evolved the ability to live out of water over 350 million years ago. Which of the following had to have been true for natural selection to have favored the original evolution of limbs? A Closely related lineages that remained in the ocean must have gone extinct. There must have been differences in survival and or/reproduction based on size, musculature, bones or other B functional aspects of early limbs. Large predators must have been a major source of mortality for populations that spent more time in the water and less on land. The ability of some ancestral fish-tetrapod transitional forms to move from one body of water to another during droughts must have led to decreased mortality. There must have been less competition for food on land.

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
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The ancestors of extant tetrapods first evolved the ability to live out of water over 350 million years ago. Which of the
following had to have been true for natural selection to have favored the original evolution of limbs?
A) Closely related lineages that remained in the ocean must have gone extinct.
There must have been differences in survival and or/reproduction based on size, musculature, bones or other
(B
functional aspects of early limbs.
Large predators must have been a major source of mortality for populations that spent more time in the water and
less on land.
The ability of some ancestral fish-tetrapod transitional forms to move from one body of water to another during
D
droughts must have led to decreased mortality.
E
There must have been less competition for food on land.
Transcribed Image Text:The ancestors of extant tetrapods first evolved the ability to live out of water over 350 million years ago. Which of the following had to have been true for natural selection to have favored the original evolution of limbs? A) Closely related lineages that remained in the ocean must have gone extinct. There must have been differences in survival and or/reproduction based on size, musculature, bones or other (B functional aspects of early limbs. Large predators must have been a major source of mortality for populations that spent more time in the water and less on land. The ability of some ancestral fish-tetrapod transitional forms to move from one body of water to another during D droughts must have led to decreased mortality. E There must have been less competition for food on land.
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