ch 29 plant diversity 1 Q1. Which group of organisms is the sister group of plants?

Background

Topic: Plant Evolution

This question tests your understanding of the evolutionary relationships between plants and other groups of organisms, specifically which group shares the most recent common ancestor with plants.

Key Terms:

• Sister group: The closest related group to another group in a phylogenetic tree.

• Charophyte: A type of green algae considered closely related to land plants.

Step-by-Step Guidance

1. Recall what a sister group means in evolutionary biology—it is the group most closely related to another group, sharing a recent common ancestor.

2. Think about the major groups of green algae and which ones share traits with land plants, such as cell wall composition and reproductive structures.

3. Review the characteristics of charophytes and chlorophytes, and compare them to land plants.

4. Consider which group is often cited in textbooks as the sister group to land plants based on molecular and morphological evidence.

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Q2. Why is a terrestrial environment better than an aquatic environment from a plant’s perspective? What are the challenges associated with a terrestrial environment?

Background

Topic: Plant Adaptation to Land

This question explores the advantages and disadvantages plants face when moving from water to land.

Key Terms:

• Terrestrial environment: Land-based habitat.

• Aquatic environment: Water-based habitat.

• Adaptation: Traits that help organisms survive in their environment.

Step-by-Step Guidance

1. List the benefits plants gain from living on land, such as increased sunlight and access to carbon dioxide.

2. Identify the challenges plants face on land, like desiccation (drying out), gravity, and reproduction without water.

3. Think about the adaptations plants evolved to overcome these challenges, such as cuticles and stomata.

4. Organize your answer into two parts: advantages and challenges.

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Q3. What are the five derived traits of plants?

Background

Topic: Plant Evolutionary Innovations

This question asks you to recall the key features that distinguish land plants from their algal ancestors.

Key Terms:

• Derived traits: Features that evolved in land plants and are not found in their algal ancestors.

• Alternation of generations, multicellular dependent embryos, walled spores, multicellular gametangia, apical meristems.

Step-by-Step Guidance

1. Recall the five major traits that are unique to land plants.

2. Think about how each trait helps plants survive on land.

3. List each trait and briefly describe its function.

4. Check your textbook or notes for the specific names and descriptions of these traits.

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Q4. Draw a diagram of the alternation of generations. Which stages are diploid, and which stages are haploid?

Background

Topic: Plant Life Cycle

This question tests your understanding of the alternation of generations in plants, including the ploidy of each stage.

Key Terms:

• Alternation of generations: Life cycle alternating between haploid and diploid stages.

• Gametophyte: Haploid stage.

• Sporophyte: Diploid stage.

• Spore: Haploid reproductive cell.

• Zygote: Diploid cell formed by fertilization.

Step-by-Step Guidance

1. Start by drawing a circle or flowchart showing the alternation between gametophyte and sporophyte stages.

2. Label the gametophyte as haploid () and the sporophyte as diploid ().

3. Show where meiosis and fertilization occur in the cycle.

4. Indicate which structures produce spores and gametes.

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Q5. What are apical meristems?

Background

Topic: Plant Growth and Development

This question focuses on the structures responsible for plant growth.

Key Terms:

• Apical meristem: Region of actively dividing cells at the tips of roots and shoots.

• Meristem: Tissue in plants that can divide and differentiate.

Step-by-Step Guidance

1. Recall where apical meristems are located in plants.

2. Think about their function in plant growth.

3. Consider how apical meristems contribute to primary growth (lengthening of roots and shoots).

4. Review the difference between apical and lateral meristems.

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Q6. What is the difference between vascular and non-vascular plants (bryophytes)?

Background

Topic: Plant Classification

This question tests your understanding of the structural differences between major plant groups.

Key Terms:

• Vascular plants: Plants with specialized tissues (xylem and phloem) for transporting water and nutrients.

• Non-vascular plants (bryophytes): Plants lacking these tissues.

• Xylem: Tissue that transports water.

• Phloem: Tissue that transports sugars.

Step-by-Step Guidance

1. Identify the presence or absence of vascular tissue in each group.

2. Consider how this affects their size, structure, and habitat.

3. Think about examples of each group (e.g., mosses for bryophytes, ferns for vascular plants).

4. Review how water and nutrients are transported in each group.

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Q7. What do non-vascular plants and seedless vascular plants have in common?

Background

Topic: Plant Groups Comparison

This question asks you to compare two groups of plants and identify their shared characteristics.

Key Terms:

• Non-vascular plants: Bryophytes (mosses, liverworts, hornworts).

• Seedless vascular plants: Ferns, lycophytes, monilophytes.

• Spore: Reproductive cell.

Step-by-Step Guidance

1. List the reproductive strategies of both groups.

2. Consider whether they produce seeds or spores.

3. Think about their dependence on water for reproduction.

4. Review their life cycle similarities.

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Q8. Why are the non-vascular plants shorter than vascular plants?

Background

Topic: Plant Structure and Function

This question explores the reasons for differences in plant height between groups.

Key Terms:

• Vascular tissue: Xylem and phloem.

• Support and transport: Ability to move water and nutrients.

Step-by-Step Guidance

1. Recall the function of vascular tissue in plants.

2. Consider how the absence of vascular tissue affects water and nutrient transport.

3. Think about how this limits the size and height of non-vascular plants.

4. Review examples of non-vascular plants and their typical habitats.

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Q9. What is the relationship between the sporophyte and gametophyte in bryophytes?

Background

Topic: Plant Life Cycle

This question focuses on the interaction between life cycle stages in bryophytes.

Key Terms:

• Sporophyte: Diploid stage.

• Gametophyte: Haploid stage.

• Bryophytes: Non-vascular plants.

Step-by-Step Guidance

1. Recall which stage is dominant in bryophytes.

2. Think about how the sporophyte is physically related to the gametophyte.

3. Consider whether the sporophyte is independent or dependent on the gametophyte.

4. Review the reproductive roles of each stage.

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Q10. What are the two types of seedless vascular plants?

Background

Topic: Plant Classification

This question asks you to identify the main groups of seedless vascular plants.

Key Terms:

• Lycophytes: Club mosses and relatives.

• Monilophytes: Ferns and relatives.

Step-by-Step Guidance

1. Recall the classification of seedless vascular plants.

2. Identify the two main groups based on their evolutionary history.

3. Think about examples of each group.

4. Review their distinguishing features.

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Q11. Which generation is dominant in the nonvascular plants? And in seedless vascular plants?

Background

Topic: Plant Life Cycle

This question tests your knowledge of which life cycle stage is dominant in different plant groups.

Key Terms:

• Dominant generation: The stage that is most prominent and long-lived.

• Gametophyte: Haploid stage.

• Sporophyte: Diploid stage.

Step-by-Step Guidance

1. Recall which stage is dominant in bryophytes (nonvascular plants).

2. Recall which stage is dominant in seedless vascular plants.

3. Think about the life cycle diagrams for each group.

4. Review the characteristics of each stage.

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Q12. What is produced by archegonia? Antheridia?

Background

Topic: Plant Reproduction

This question asks you to recall the function of reproductive organs in plants.

Key Terms:

• Archegonia: Female reproductive organ.

• Antheridia: Male reproductive organ.

• Egg: Female gamete.

• Sperm: Male gamete.

Step-by-Step Guidance

1. Recall the function of archegonia and antheridia in the gametophyte stage.

2. Identify which gamete each structure produces.

3. Think about the process of fertilization in plants.

4. Review examples in mosses and ferns.

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Q13. Are archegonia and antheridia produced by gametophytes or sporophytes?

Background

Topic: Plant Reproduction

This question tests your understanding of which life cycle stage produces reproductive organs.

Key Terms:

• Gametophyte: Haploid stage.

• Sporophyte: Diploid stage.

• Archegonia and antheridia: Gamete-producing organs.

Step-by-Step Guidance

1. Recall the function of gametophytes and sporophytes.

2. Think about which stage produces gametes.

3. Review the location of archegonia and antheridia in the plant life cycle.

4. Check your notes or textbook for confirmation.

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Q14. Do gametophytes or sporophytes produce spores?

Background

Topic: Plant Life Cycle

This question asks you to identify which stage produces spores.

Key Terms:

• Gametophyte: Haploid stage.

• Sporophyte: Diploid stage.

• Spore: Haploid reproductive cell.

Step-by-Step Guidance

1. Recall the function of spores in the plant life cycle.

2. Think about which stage undergoes meiosis to produce spores.

3. Review the alternation of generations diagram.

4. Check your notes for which structure produces spores.

Try solving on your own before revealing the answer!

Q15. What is the evolutionary importance of vascular plants?

Background

Topic: Plant Evolution

This question asks you to explain why vascular plants are significant in plant evolution.

Key Terms:

• Vascular tissue: Xylem and phloem.

• Adaptation: Evolutionary change that improves survival.

Step-by-Step Guidance

1. Recall the functions of vascular tissue in plants.

2. Think about how vascular tissue allowed plants to colonize new environments.

3. Consider the impact on plant size, diversity, and ecosystem structure.

4. Review examples of vascular plants and their ecological roles.

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Q16. What are the derived traits of vascular plants?

Background

Topic: Plant Evolutionary Innovations

This question asks you to list the features that distinguish vascular plants from nonvascular plants.

Key Terms:

• Vascular tissue: Xylem and phloem.

• Roots, leaves, sporophylls.

Step-by-Step Guidance

1. Recall the main features that evolved in vascular plants.

2. List each trait and its function.

3. Think about how these traits help plants survive and reproduce.

4. Check your notes for the specific names and descriptions.

Try solving on your own before revealing the answer!

Q17. What is vascular tissue?

Background

Topic: Plant Structure

This question asks you to define vascular tissue and its function.

Key Terms:

• Xylem: Transports water and minerals.

• Phloem: Transports sugars and organic nutrients.

Step-by-Step Guidance

1. Recall the two main types of vascular tissue.

2. Describe the function of each type.

3. Think about how vascular tissue supports plant growth and survival.

4. Review examples of plants with vascular tissue.

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Q18. What are leaves and what are roots? What is the adaptive advantage of leaves and of roots?

Background

Topic: Plant Structure and Adaptation

This question asks you to define leaves and roots and explain their adaptive advantages.

Key Terms:

• Leaves: Photosynthetic organs.

• Roots: Structures for anchorage and absorption.

• Adaptive advantage: Trait that improves survival or reproduction.

Step-by-Step Guidance

1. Define leaves and roots.

2. Describe the function of each structure.

3. Explain how leaves and roots help plants survive and thrive.

4. Review examples of adaptations in leaves and roots.

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Q19. Which group of seedless vascular plants is the most diverse?

Background

Topic: Plant Diversity

This question asks you to identify the most diverse group among seedless vascular plants.

Key Terms:

• Seedless vascular plants: Lycophytes and monilophytes.

• Diversity: Number of species.

Step-by-Step Guidance

1. Recall the two main groups of seedless vascular plants.

2. Think about which group has more species and greater variety.

3. Review examples of each group.

4. Check your textbook or notes for the most diverse group.

Try solving on your own before revealing the answer!