Concept explainers
To review:
The branching of
Introduction:
The evolution of prokaryotes and eukaryotes took place at different periods according to various theories of evolution. The evolutionary history of many eukaryotic microbes can be studied with the help of common morphological characters and molecular sequences. This provides clues about the evolution of multiple species from the common ancestor.
Explanation of Solution
The eukaryotes evolved in many diverse forms such as amoeba, paramecium, protists, fungi, algae, and animals. These species are arranged into branched trees called clades as per their origin. The clade Opisthokonta includes Eumycota (true fungi), Metazoa (multicellular animals), and certain protists.
Some evidences show the closeness among fungi and animals. One such evidence is the presence of similar insertion or deletion sequences in fungi and animals. These sequences can be studied by genome analysis. For example, the presence of a short sequence insertion in elongation factor 1α (EF-1α). Twelve amino acids are encoded by this insert that is found in fungi and animals and is absent in plants and protists.
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Chapter 20 Solutions
Microbiology: An Evolving Science (Fourth Edition)
- What distinguishes protists from prokaryotes? What distinguishes protists from fungi, land plants, and animals?arrow_forwardPlease briefly describe the idea of endosymbiosis and its role in protist evolution-relate to the idea of function of the group.arrow_forwardWhich phyla of fungi are composed of non-septate hyphae? Enumerate four. What are the synapomorphies of Ascomycota and Basidiomycota making them sister groups? Enumerate 2. What are the differences between ascomycota and basidiomycota. Give 2 basis for differentiation.arrow_forward
- Is fungi is eukaryotic and prokaryotic?arrow_forwardDraw a phylogenetic tree of the major groups of fungi.arrow_forwardIs protist dna in a nucleus unicellular or multicellular?According to the phylogeny presented in this chapter which protists are in the same eukaryotic supergroup as plants a) green algae b) dinoflagellates c) red algaed both a and c in a lifecycle with alternation of generations multicellular haploid forms alternate with a unicellular haploid forms b unicellular diploid formsc multicellular haploid forms d) multicellular diploid formsarrow_forward
- Give arguments to support the hypothesis that chytrids may have been the earliest fungal group to evolve from the most recent common ancestor of fungi.arrow_forwardDescribe the morphology of oomycetes. Which protists are known for their cytoplasmic streaming movement? Which protists occasionally resemble tiny snails? What are the shells made of? Which group of protists have elaborate exteriors of glassy silica and are very common in the fossil record? What supergroup do land plants share a common ancestor with? What protists are common in tropical waters and are generally called “seaweeds?” Which of the algaes are the furthest living relatives to land plants? Which algaes are the closest living relatives to land plants? Which protists move using tube-like pseudopodia? Which protist group exhibits similarities to fungi as a result of convergent evolution? Which protist group takes on a slug form when nutrients are hard to come by? What protist group do animals share a common ancestor with? What are the choanoflagellates are believed to resemble? Which group contains at least one type of human parasite? Ecology of…arrow_forwardWhat feature do all ‘protists’ have in common that differentiates them from fungi, plants and animals?arrow_forward
- Explain the taxonomic kingdom ( Animalia, Plantae, Fungi, Protista, Archea, and Bacteria) If you were to choose what kingdom would you be classified and why?arrow_forwardFungi and animals are both part of a group called Opisthokonta. The vast majority of fungi are multicellular. However, their sister taxon consists of unicellular species. Animals also are multicellular and their closest relatives are again unicellular. Briefly describe the two hypotheses that could explain the origin of multicellularity in the Opisthokonta, and then explain which of the two is the more likely hypothesisarrow_forwardCompare the phylogenetic tree of protists with the secondary endosymbiosis theory which proposes how photosynthetic protists evolved. Are both reconcilable? Explain.arrow_forward
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