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…

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter15: Diversity Of Animals

Section: Chapter Questions

Problem 5RQ: Which of the following does not occur? a. radially symmetrical diploblast b. diploblastic...

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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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