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LIFE 121 - Chapter 25: The Origin and Diversification of Eukaryotes Flashcards

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2220766384A. NucleusWhich of the following is associated only with eukaryotes A. Nucleus B. DNA C. Flagella D. Ribosomes E. Chromosomes0
2220813237eukaryotesMembrane enclosed organelles with specialized functions are only present in...1
2220813238Golgi apparatusSynthesizes and secretes cell products2
2220813239ERSynthesizes membranes, aids in metabolism3
2220814792mitochondrionPerforms cellular respiration, ATP production4
2220863681D. An organism containing an endosymbiont is engulfed by another organism and becomes an endosymbiont.Which of the following is true of secondary endosymbiosis? A. It is indicated by the presence of a double membrane surrounding the endymbiont. B. An organism containing one endosymbiont engulfs another organism, and that organism becomes an endosymbiont. C. It is indicated by the presence of a nucleomorph. D. An organism containing an endosymbiont is engulfed by another organism and becomes an endosymbiont. E. It is indicated by the presence of a mixotroph.5
2220870124modified or reduced mitochondriaThe cellular powerhouse of diplomonads and parabsalids are...6
2220872860AlveolataThe membranes of this clade, which include dinoflagellates, apicomplexans, and ciliates are characterized by cells with small, membrane-bounded cavities under their cell membranes7
2220890620photosyntheticGreen, brown, and red algae, chlorophytes, and charophyceans are some examples of protists that are...8
2220894764kinetoplastidsParasitic, flagellated cells that have a single, large mitochondrion containing an organized mass of DNA, and can cause sleeping sickness are classified as...9
2220904710brown algae, red algae, and green algaeThese three groups contain large algae, also known as seaweeds10
2220905931B. Cellular slime molds (they're ameobozoans)Stramenophiles include all of the following except... A. Water molds B. Cellular slime molds C. Diatoms D. Brown algae E. Golden algae11
2220913209diatomsThis group is characterized by glasslike walls containing silica12
2220915168apicomplexanPlasmodiu, the parasitic organism that causes malaria, is a(n)...13
2220923406ciliateA paramecium is a(n)...14
2220925182brown algaeThe largest seaweeds are...15
2220930583ciliatesThese organisms move and feed using tiny hairlike appendages16
2220936774stramenopilaThis group is characterized by cells with fine, hairlike projections on their flagella17
2220945498red algaeThe specialized photosynthetic pigment of these organisms allow them to live in deep water18
2220949435oomycetesThis group (water molds and their relatives) includes both aquatic decomposers and parasites responsible for late potato blight19
2220952660chlorophytesThis algal group has chloroplasts much like those of green plants in structure and makeup20
2220959551dinoflagellatesThe organisms responsible for red tide are...21
2220966105cellular slime moldsThese organisms form a multicellular mass that forms fruiting bodies when food is scarce, but their cells remain separated22
2220970890Protista is polyphyletic and some protists are more closely related to plants, animals, or fungi, than they are to other protistsThe reason that the kingdom Protista has been abandoned23
2220976833merozoitesThe form of Plasmodium that is the immediate cause of anemia in humans24
2220984399merozoitesMerozoites live off the hemoglobin and nutrients in red blood cells and divide to produce these, destroying red blood cells in the process25
2220986281Cytotoxic T cellsThe cells that destroy infected liver cells by recognizing a Plasmodium protein on the surface of those cells26
2220992473they showed that organic molecules such as amino acids could be produced from inorganic moleculesMiller and Urey's experiments that attempted to recreate conditions on early Earth were significant because...27
22209949474.5 bya, 3.9 byaEarth probably formed about ______, and the first life evolved as early as _____28
2220999175From engulfed, originally free-living proteobacteriaAccording to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate?29
2221003534chloroplastThis organelle was derived from an ancestral cyanobacterium30
2221009308E. Colonial photosynthetic eukaryoteIn a sample of pond water, a new organism is identified with the following characteristics: It consists of 70 cells surrounded by rigid cell walls, which join the cells together. Inside each of these identical cells are mitochondria and chloroplasts. Such an organism would most likely be classified as a... A. Colonial eukaryotic fungus B. Multicellular photosynthetic prokaryote C. Fungal photosynthetic eukaryote D. Colonial photosynthetic prokaryote E. Colonial photosynthetic eukaryote31
2221013395A. cellular adhesion and intercellular communicationThe evolution of multicellularity in animals required adaptations that promoted A. cellular adhesion and intercellular communication B. cellular migration and cellular adhesion. C. photosynthesis and cellular migration. D. cellular fusion and regeneration. E. cellular migration and intercellular communication32
2221017246E. diplomonads and parabasalidsWhich of the following are two groups that are adapted to anaerobic conditions and contain reduced mitochondria that lack DNA? A.dinoflagellates and diatoms B. chlorophytes and radiolarians C. apicomplexans and forams D. gymnamoebas and slime molds E. diplomonads and parabasalids33
2221020492cyanobacteriumArchaeplastids, which include red and green algae and land plants, are thought to have descended from a heterotrophic protist that engulfed a(n)...34
2221024600conjugationThe process that, in ciliates, is sexual, and results in the production of two genetically novel individuals by combining the genes of two parents35
2221029718phytoplanktonThis group of prokaryotic autotrophs floats near the surface of the water and is the basis of the food chain36
2221031529RNA has both information storage and catalytic propertiesWhy do some scientists believe that RNA, rather than DNA, was the first genetic material?37
2221033168B. Their offspring may be more adaptable to changes in the environment.What advantage do organisms that reproduce sexually have over organisms that reproduce asexually? A. Their offspring are bigger and better able to reproduce. B. Their offspring may be more adaptable to changes in the environment. C. Their offspring can exist in both haploid and diploid stages. D. Their offspring may have more mutations.38
2221037226syngamyThe term that describes the fusion of two gametes to form a diploid zygote39
2221040529gametophyteThe multicellular haploid form of a protist that shows alternation of generations40
2221043149holdfastThe structure that mediates the attachment of spores to a surface on which to grow41
2221049870haploid sporesThe product of a diploid sporophyte's role in alternation of generations42
2221056284haploid, mitosis, gametes, diploid zygoteGametophytes are ______ adults that produce cells that undergo ______ and form ______ that fuse to form a...43
2221061305haploid, gametophytes, haploidOrganisms that exhibit alternation of generations reproduce asexually in the diploid stage by producing _________ cells that form _______, which germinate into _______ adults44
2221068340apicomplexansParasites with intricate life cycles are...45
2221073031rhizariansMorphologically diverse group that include amoebas with threadlike pseudopodia are...46
2221078234diatomsImportant producers in aquatic communities47
2221080682B. occurred independently in several different eukaryotic lineages.The evolution of complex multicellularity in eukaryotes... A. is not documented by the fossil record. B. occurred independently in several different eukaryotic lineages. C. occurred only once, in the animal lineage. D. occurred only once, in the common ancestor of all eukaryotes. E. occurred only once, in the common ancestor of all multicellular eukaryotes.48
2221087291C. secondary endosymbiosis.Plastids that are surrounded by more than two membranes are evidence of... A. origin of the plastids from archaea. B. fusion of plastids. C. secondary endosymbiosis. D. budding of the plastids from the nuclear envelope. E. evolution from mitochondria.49
2221092604All eukaryotes have mitochondria (or their remnants, whereas many eukaryotes do not have plastidsThe reason that biologist think that endosymbiosis gave rise to mitochondria before plastids50
2221097641MitochondriaWhat feature is found in all protist lineages?51
2221444221archaealOrigin of DNA replication enzymes52
2221444222archaealOrigin of transcription enzymes53
2221445484mostly archaealOrigin of translation enzymes54
2221446717mostly archaealOrigin of cell division apparatus55
2221449804archaeal and bacterialOrigin of the endoplasmic reticulum56
2221450592bacterialOrigin of the mitochondrion57
2221450593mostly bacterialOrigin of metabolic genes58
2221460924alpha proteobacteriaThe type of proteobacterium that gave rise to mitochondria59
2221471126red and green algaePrimary endosymbiosis of cyanobacterium gave rise to...60
2221473470dinoflagellates and stramenopilesSecondary endosymbiosis of red algae into a heterotrophic eukaryote gave rise to...61
2221474723euglenids and chlorarachniophytesSecondary endosymbiosis of green algae into a heterotrophic eukaryote gave rise to...62
2221499283ChoanoflagellatesThe closest living relatives to animals63
2221533201ExcavataSome members of this supergroup have an "excavated" groove on one side of their cell body64
2221546044StramenopilaMembers of this clade are some of the most important photosynthetic organisms on Earth65
2221554832diatoms and brown algaeStramenopiles include...66
2221554833dinoflagellates, apicomplexans, and ciliatesAlveolates include...67
2221555916forams and cercozoansRhizarians include...68
2221590921ArchaeplastidaThis old supergroup of eukaryotes includes red and green algae, along with land plants69
2221600635UnikontaThis supergroup of eukaryotes includes amoebas that have lobe- or tube-shaped pseudopodia, as well as animals, fungi, and non-amoeba protists that are closely related to them70
2221605386anaerobicMost diplomonads and parabsalids are found in _______ environments71
2221606738functional electron transport chains, oxygenThe reduced mitochondria of diplomonads lacks _______ and hence cannot use _______ to help extract energy from carbohydrates and other organic molecules72
2221615195hydrogenosomes, hydrogen gasThe reduced mitochondria of parabsalids are called _________ and release ______ gas as a byproduct73
2221619198predatory heterotrophs, photosynthetic autotrophs, and parasitesProtists called euglenozoans belong to a diverse clade that includes...74
2221623700presence of a rod with either a spiral or crystalline structure inside of their flagellaThe main morphological feature that distinguishes euglenozoans is the...75
2221692029testsForams are named for their porous shells, called...76
2221697535threadlike pseudopodiaCercozoans are ameboid and flagellated protists that feed with...77
2221699401predators and parasitesMany cercozoans are...78
2221717600land plantsArchaeplastids gave rise to...79
2221720842red algaeThe most abundant large algae in the warm coastal waters of tropical oceans are...80
2221751874A. a red alga that lived 1.2 byaThe oldest fossil eukaryote that can be resolved taxonomically is of... A. a red alga that lived 1.2 bya B. a red alga that lived 635 mya C. a fungus that lived 2 bya D. A fungus that lived 550 mya E. an Edicaran that lived 550 mya81
2221772911E. occured independently in several different eukaryotic lineagesThe evolution of complex multicellularity in eukaryotes... A. occured only once, in the common ancestor of all eukaryotes B. occured only once, in the common ancestry of all multicellular eukaryotes C. Occured only once, in the animal lineage D. is not documented by the fossil record E. occured independently in several different eukaryotic lineages82

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