Recall that all clades are monophyletic groups by definition. THere are two form
ID: 189930 • Letter: R
Question
Recall that all clades are monophyletic groups by definition. THere are two forms of non-monophyletic groups: paraphyletic taxa that contain some, but not all the decendents of a recent common ancestor, and polyphyletic taxa that contain decendents of more than one recent common ancestor.
Are the seedless vascular plants monophyletic or polyphyletic?
Which of the five features that appeared in the last common ancestor of embryophytes helps to keep them from drying out?
What feature appeared independently in both the lycophytes abd the seed plants?
Bryophytes Lycophytes Gymnosperms Coleochaete Chara Liverworts Mosses Hornworts Lycopodium Hornworts lycopodium Selaginelle Psilotum Eguism Fern yeed Ginkgo Conifers Gnetophytes ycad carpel, frut Seed Plants ntegument, ovule, seeds polien wilth pollen tube Euphyllophytes Chloroplast DNA inversion, leaves deived from branches Tracheophytes Vascular tisue (rylem &phloeml; tracheids, apical meristem, reduced gametophyte dominate branched sporophyte with stormata 8 Waxy Cuticle. Alternation of generations, muiticelbular garmetangla with sterile jacket Unbranched sporophyte with sporangium with sterile jacket, multicelular embrya Apical cell with 2 or more cutting faces Sterle jacket Get talßler, reduce gametophyte, enhance sporophyte less H20 dependence, mone complex growth Single apical cell, multiceluarity, haplontik egg & sperm, zygote retainedExplanation / Answer
Ans- the seedless vascular plants are known to be polyphyletic.the features that helps embrophytes to avoid drying is cuticle.
In lycophytes and seed plants the feature that appear indipendently is heterospory.
Monilophytes are the plants whose DNA for chloroplasts have inversed.
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