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Campbell Biology in Focus

Biology

Quiz 25 :

The Origin and Diversification of Eukaryotes

Quiz 25 :

The Origin and Diversification of Eukaryotes

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Multicellular colonies of plant cells adhere to each other primarily by ________,whereas multicellular colonies of animal cells are typically held together by ________.
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C

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Why can eukaryotes be considered "combination" organisms?
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A

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According to the endosymbiotic theory of the origin of eukaryotic cells,how did mitochondria originate?
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B

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Which of the following statements support(s)the theory of the endosymbiotic origin of mitochondria and plastids? I.Mitochondria and plastids have circular DNA and replicate by splitting. II.Mitochondria and plastids have ribosomes. III.Mitochondrial and plastid ribosomal RNA sequences are more similar to cytoplasmic ribosomes than to bacterial ones. IV.The inner membranes of plastids and mitochondria have transport proteins homologous to those in bacterial plasma membranes.
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Imagine you are investigating life in the shallow soils of a forest.In your collected samples,you observe evidence of various single-celled organisms using multiple genetic techniques as well as microscopy.If the organisms you initially assess possess mostly asymmetric or irregular forms,then this particular sample probably has many
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The last common ancestor of fungi and animals was most likely a
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Which of the following organism pairs is/are an example of secondary endosymbiosis? I.red algae-heterotrophic eukaryote II.green algae-heterotrophic eukaryote III.E.coli bacteria-photosynthetic cyanobacterium IV.Chlamydomonas and Gonium
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All protists are
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An individual mixotroph loses its plastids yet continues to survive.Which of the following most likely accounts for its continued survival?
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Which of the following is the most likely sequence of events,from earliest to most recent,in the evolution of sponges (organisms with many cells that have different functions)? 1)single-celled eukaryote 2)single-celled prokaryote 3)multicellular eukaryote 4)colonial eukaryote
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Which of the following was derived from an ancestral cyanobacterium?
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The evolution of multicellularity in animals has primarily occurred by
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The evolution of multicellularity in animals required adaptations that promoted
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What does scientific evidence indicate to be the correct sequence of these events,from earliest to most recent,in the evolution of life on Earth? 1)origin of mitochondria 2)origin of multicellular eukaryotes 3)origin of chloroplasts 4)origin of cyanobacteria 5)origin of fungal-plant symbioses
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The theory of endosymbiosis and history of life on Earth allows one to predict that the gene sequences that are responsible for encoding functional,mitochondrial ribosomes in a particular tree likely share many similar nucleotides in the sequences from the ribosomal genes of I.other plant species. II.bacterial species. III.other tree species.
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Which statement is correct with regard to the origins of multicellular organisms?
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Which of these observations gives the most support to the endosymbiotic theory for the origin of eukaryotic cells?
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In a sample of pond water,a new organism is identified with the following characteristics: It consists of 70 cells surrounded by rigid cell walls that join the cells together.Inside each of these identical cells are mitochondria and chloroplasts.Such an organism would most likely be classified as a
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The chloroplasts of all of the following are thought to be derived from ancestral red algae,except those of
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Which statement is correct with regard to the comparison of secondary endosymbiosis to primary endosymbiosis?
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