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Biology - Plants Diversity and Reproduction

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    Study Guide Biology – Plants: Diversity and Reproduction 1. Quiz Plants Diversity and Reproduction 1. Question Which of the following is a correct description of plants? Answer Choices • multicellular eukaryotic autotrophs • multicellular prokaryotic heterotrophs • single - celled autotrophs Correct Answer multicellular eukaryotic autotrophs Why This Is Correct Plants are multicellular , their cells are eukaryotic (they have nuclei and organelles), and they are autotrophs , meaning they make their own food through photosynthesis. The other options describe organisms that are not plants. 2. Question A distinguishing characteristic of plants is their type of chlorophyll. Which of the following is a TRUE statement about plants? Answer Choices • They have both chlorophyll a and chlorophyll b . • They have chlorophyll a only. • They have chlorophyll b only.

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    Study Guide Correct Answer They have both chlorophyll a and chlorophyll b . Why This Is Correct Plants contain both chlorophyll a and chlorophyll b . Chlorophyll a plays the primary role in photosynthesis, while chlorophyll b acts as an accessory pigment that helps capture additional light energy. Having both types of chlorophyll is a key feature that helps distinguish plants from many other photosynthetic organisms. 3. Question Which of the following is an example of a seedless vascular plant? Answer Choices • bryophyte • fern • flowering plant Correct Answer fern Why This Is Correct Ferns are seedless vascular plants . They have vascular tissues (xylem and phloem) for transporting water and nutrients, but they reproduce using spores , not seeds. Bryophytes are nonvascular plants, and flowering plants produce seeds, so neither fits this category. 4. Question Which of the following is an example of a plant with protected seeds?

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    Study Guide Answer Choices • bryophyte • fern • flowering plant Correct Answer flowering plant Why This Is Correct Flowering plants (angiosperms) produce seeds that are protected inside fruits , which develop from flowers after fertilization. Bryophytes and ferns do not produce seeds at all — they reproduce using spores — so they do not have protected seeds. 5. Question Which of the following is an example of a nonvascular plant? Answer Choices • bryophyte • fern • flowering plant Correct Answer bryophyte Why This Is Correct Bryophytes are nonvascular plants , meaning they lack vascular tissues (xylem and phloem) for transporting water and nutrients. Examples include mosses and liverworts. Ferns and flowering plants are vascular plants, so they are not correct answer s.

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    Study Guide 6. Question How 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. • It has a single - celled diploid phase. Correct Answer It has a multicellular haploid phase. Why This Is Correct Plants undergo alternation of generations , meaning they have both a multicellular haploid stage (gametophyte) and a multicellular diploid stage (sporophyte) . In contrast, animals do not have a multicellular haploid phase — their haploid stage is limited to single - celled gametes. 7. Question Fill in the blank: Sporophytes undergo _________________ to produce haploid spores. Answer Choices • fertilization • meiosis • mitosis Correct Answer meiosis

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    Study Guide Why This Is Correct Sporophytes are diploid and produce haploid spores by undergoing meiosis , a type of cell division that reduces the chromosome number by half. Fertilization combines gametes to form a diploid zygote, and mitosis does not change the chromosome number, so neither is correct here. 8. Question Fill in the blank: In plants, egg cells are formed in a structure called a(n) ________________. Answer Choices • antheridium • archegonium • pellicle Correct Answer archegonium Why This Is Correct In plants, the archegonium is the female reproductive structure where egg cells are produced . The antheridium is the male structure that produces sperm, and the pellicle is a protective outer covering found in some protists, not a plant reproductive structure. 9. Question Fill 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 Guide Correct Answer antheridium Why This Is Correct In plants, the antheridium is the male reproductive structure that produces sperm cells . The archegonium is the female structure that produces eggs, and the pellicle is a protective layer found in some protists, not a reproductive structure. 2. Introduction to Plants Plants are multicellular eukaryotic organisms that can make their own food through photosynthesis . Because they produce their own food, plants are called autotrophs . In the past, algae were grouped together with plants. Today, however, algae are classified as protists , not plants. Modern definitions of plants focus mainly on organisms that live on land , though some plants also live in water. Algae are excluded because they live primarily in aquatic environments. 2.1 Chlorophyll and Plant Evolution A key feature that helps distinguish plants from many algae is the type of chlorophyll they contain. • Chlorophyll is the pigment that absorbs sunlight for photosynthesis. • Plants have chlorophyll a and chlorophyll b . • Many algae species lack chlorophyll b . Because green algae share many traits with land plants, many evolutionary biologists believe that green algae were the ancestors of modern land plants . 2.2 Major Groups of Plants Plants are divided into two main groups based on how they transport water and nutrients.

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