part i Animal phylogenies based on molecular and morphological characters can be different in regards to the placement of the phylum Platyhelminthes. What is the best explanation for this?choose 1a.The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom.b.Some Platyhelminthes have a coelom, but others do not and it is difficult to conclude anything about its evolution within the clade.c.Platyhelminthes originated from ancestors with a coelom and have retained it to the present time.d.Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one.e.Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution. part ii If current molecular phylogenies of land plants are correct and to be believed they suggest that. Choose 1 a.the Zygnematales and land plants adapted to the same environmental pressures (drying out) in different waysb.the Zygnematales must have been structurally less complex in the pastc.the Coleochaetales and land plants adapted to the same environmental pressures (drying out) in different waysd.the Charales and land plants adapted to the same environmental pressures (drying out) in different wayse.the Coleochaetales must have been structurally more complex in the past

1) Phylogenetic trees basically reconstructed from different genes in the same organism. However it…

Answered: Animal phylogenies based on molecular…

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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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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part i Animal phylogenies based on molecular and morphological characters can be different in regards to the placement of the phylum Platyhelminthes. What is the best explanation for this?choose 1

The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom.

Some Platyhelminthes have a coelom, but others do not and it is difficult to conclude anything about its evolution within the clade.

Platyhelminthes originated from ancestors with a coelom and have retained it to the present time.

Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one.

Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution.

part ii

If current molecular phylogenies of land plants are correct and to be believed they suggest that. Choose 1

the Zygnematales and land plants adapted to the same environmental pressures (drying out) in different ways

the Zygnematales must have been structurally less complex in the past

the Coleochaetales and land plants adapted to the same environmental pressures (drying out) in different ways

the Charales and land plants adapted to the same environmental pressures (drying out) in different ways

the Coleochaetales must have been structurally more complex in the past

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