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Refer to the figure of animal phylogeny (thick portions of each branch represent time from the earliest known specimen to the present. The time estimates for branch points when lineages diverged from common ancestors are based on time-calibrated DNA sequence differences). Evidence of the first vertebrates are seen in the fossil record of the period, but based on the phylogenetic reconstruction they are believed to have evolved long before the period. a. Ediacaran, Cambrian O b. Cambrian, Ediacaran c. Ordovician, Cambrian

Refer to the figure of animal phylogeny (thick portions of each branch represent time from the earliest known specimen to the present. The time estimates for branch points when lineages diverged from common ancestors are based on time-calibrated DNA sequence differences). Evidence of the first vertebrates are seen in the fossil record of the period, but based on the phylogenetic reconstruction they are believed to have evolved long before the period. a. Ediacaran, Cambrian O b. Cambrian, Ediacaran c. Ordovician, Cambrian

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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800 Proterozoic 700 600 541 Phanerozoic 485 Demospongiae Hemichordata Echinodermata Vertebrata Nemertea Brachiopoda Mollusca Annelida Bryozoa Priapulida Onychophora Arthropoda Cnidaria
Transcribed Image Text:800 Proterozoic 700 600 541 Phanerozoic 485 Demospongiae Hemichordata Echinodermata Vertebrata Nemertea Brachiopoda Mollusca Annelida Bryozoa Priapulida Onychophora Arthropoda Cnidaria
Refer to the figure of animal phylogeny (thick portions of each branch represent time from the earliest known specimen to the present. The time estimates for branch points when lineages diverged from common ancestors are based on time-calibrated DNA sequence differences). Evidence of the first vertebrates are seen in the fossil record of the period, but based on the phylogenetic reconstruction they are believed to have evolved long before the period. a. Ediacaran, Cambrian O b. Cambrian, Ediacaran O c. Ordovician, Cambrian d. Devonian, Ordovician O e. Jurassic, Ordovician
Transcribed Image Text:Refer to the figure of animal phylogeny (thick portions of each branch represent time from the earliest known specimen to the present. The time estimates for branch points when lineages diverged from common ancestors are based on time-calibrated DNA sequence differences). Evidence of the first vertebrates are seen in the fossil record of the period, but based on the phylogenetic reconstruction they are believed to have evolved long before the period. a. Ediacaran, Cambrian O b. Cambrian, Ediacaran O c. Ordovician, Cambrian d. Devonian, Ordovician O e. Jurassic, Ordovician
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