Biology - Plants Diversity and Reproduction - Quick Guides

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Study GuideBiology–Plants: Diversity and Reproduction1. Quiz Plants Diversity and Reproduction1. QuestionWhich of the following is a correct description of plants?Answer Choices•multicellular eukaryotic autotrophs•multicellular prokaryotic heterotrophs•single-celled autotrophsCorrect Answermulticellular eukaryotic autotrophsWhy This Is CorrectPlants aremulticellular, their cells areeukaryotic(they have nuclei and organelles), and they areautotrophs, meaning they make their own food through photosynthesis.The other options describe organisms that are not plants.2. QuestionA distinguishing characteristic of plants is their type of chlorophyll. Which of the following is a TRUEstatement about plants?Answer Choices•They have both chlorophyllaand chlorophyllb.•They have chlorophyllaonly.•They have chlorophyllbonly.

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Study GuideCorrect AnswerThey have both chlorophyllaand chlorophyllb.Why This Is CorrectPlants containboth chlorophyllaand chlorophyllb. Chlorophyllaplays the primary role inphotosynthesis, while chlorophyllbacts as an accessory pigment that helps capture additional lightenergy.Having both types of chlorophyll is a key feature that helps distinguish plants from many otherphotosynthetic organisms.3. QuestionWhich of the following is an example of a seedless vascular plant?Answer Choices•bryophyte•fern•flowering plantCorrect AnswerfernWhy This Is CorrectFernsareseedless vascular plants. They have vascular tissues (xylem and phloem) fortransporting water and nutrients, but they reproduce usingspores, not seeds.Bryophytes are nonvascular plants, and flowering plants produce seeds, so neither fits this category.4. QuestionWhich of the following is an example of a plant with protected seeds?

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Study GuideAnswer Choices•bryophyte•fern•flowering plantCorrect Answerflowering plantWhy This Is CorrectFlowering plants(angiosperms) produceseeds that are protected inside fruits, whichdevelopfrom flowers after fertilization.Bryophytes and ferns do not produce seeds at all—they reproduce using spores—so they do not haveprotected seeds.5. QuestionWhich of the following is an example of a nonvascular plant?Answer Choices•bryophyte•fern•flowering plantCorrect AnswerbryophyteWhy This Is CorrectBryophytesarenonvascular plants, meaning they lack vascular tissues (xylem and phloem) fortransporting water and nutrients. Examples include mosses and liverworts.Ferns and flowering plants are vascular plants, so they are notcorrect answers.

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Study Guide6. QuestionHow does the plant life cycle differ from the animal life cycle?Answer Choices•It does not have a haploid phase.•It has a multicellular haploid phase.•Ithas a single-celled diploid phase.Correct AnswerIt has a multicellular haploid phase.Why This Is CorrectPlants undergoalternation of generations, meaning they have both amulticellular haploid stage(gametophyte)and amulticellular diploidstage (sporophyte).In contrast, animals do not have a multicellular haploid phase—their haploid stage is limited to single-celled gametes.7. QuestionFill in the blank:Sporophytes undergo _________________ to produce haploid spores.AnswerChoices•fertilization•meiosis•mitosisCorrect Answermeiosis

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Study GuideWhy This Is CorrectSporophytes arediploidand producehaploid sporesby undergoingmeiosis, a type of cell divisionthat reduces the chromosome number by half.Fertilization combines gametes to form a diploid zygote, and mitosis does not change thechromosome number, so neither is correct here.8. QuestionFill in the blank:In plants, egg cells are formed in a structure called a(n) ________________.Answer Choices•antheridium•archegonium•pellicleCorrect AnswerarchegoniumWhy This Is CorrectIn plants, thearchegoniumis the female reproductive structure whereegg cells are produced.Theantheridiumis the male structure that produces sperm, and thepellicleis a protective outercovering found in some protists, not a plant reproductive structure.9. QuestionFill in the blank:In plants, sperm cells are formed in a structure called a(n) ________________.Answer Choices•antheridium•archegonium•pellicle

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Study GuideCorrect AnswerantheridiumWhy This Is CorrectIn plants, theantheridiumis the male reproductive structure that producessperm cells.Thearchegoniumis the female structure that produces eggs, and thepellicleis a protective layerfound in some protists, not a reproductive structure.2. Introduction to PlantsPlantsaremulticellular eukaryotic organismsthat can make their own food throughphotosynthesis. Because they produce their own food, plants are calledautotrophs.In the past,algaewere grouped together with plants. Today, however, algae are classified asprotists, not plants. Modern definitions of plants focus mainly on organisms that liveon land, thoughsome plants also live in water. Algae are excluded because they live primarily in aquaticenvironments.2.1 Chlorophyll and Plant EvolutionA key feature that helps distinguish plants from many algae is thetype of chlorophyllthey contain.•Chlorophyllis the pigment that absorbs sunlight for photosynthesis.•Plants havechlorophyll a and chlorophyll b.•Many algae species lackchlorophyll b.Because green algae share many traits with land plants, many evolutionary biologists believe thatgreen algae were the ancestors of modern land plants.2.2 Major Groups of PlantsPlants are divided intotwo main groupsbased on how they transport water and nutrients.

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