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- Gokhan Hacisalihoglu
- Florida A&M University via Florida State Open Publishing
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Gymnosperms are one of the ancient plant groups with seed production. They are a group of vascular plants with naked (without ovary) seeds. Gymnospems are also heterosporous. Furthermore, gymnosperms produce two different types of cones, namely, large female cones and small male cones. Four groups of gymnosperms are known:
- CYCADOPHYTA: 100 cycad species (cycad, sago palm)
- GINKGOPHYTA: 1 plant species (ginkgo)
- GNETOPHYTA: e.g., ephedra
- CONIFEROPHYTA: 500 species (pine, fir, cedar, juniper, redwoods)
They date back to 250 million years ago. Coniferophyta consists of largest, tallest, and oldest living trees.
\(\PageIndex{1}\). Student Learning Outcomes (SL
- SLO 09.01: Apply the best practices for learning Gymnosperms
- SLO 09.02: Describe the characteristics of phylum Coniferoophyta
- SLO 09.03: Describe the characteristics of phylum Cycadophyta
- SLO 09.04: Describe the characteristics of phylum Ginkgophyta
- SLO 09.05: Identify given plant species with their scientific names based on their key features
- SLO 09.06: Describe the characteristics of phylum Gnetophyta
- SLO 09.07: Explain the differences between spores and seeds?
\(\PageIndex{2}\). Big Picture
\(\PageIndex{3}\). Vocabulary and Key Concepts
\(\PageIndex{4}\). Test Your Knowledge
- Assessment 1: TRUE or FALSE: Cycads are diecious plants.
- Assessment 2: TRUE or FALSE: Discovery of seed increased success of land plants.
- Assessment 3: Provide specific function for sunken stomata of pine needles.
- Assessment 4: TRUE or FALSE: Most common gymnosperm phylum is conifers.
\(\PageIndex{5}\). Can You Spot These Plants?
\(\PageIndex{6}\).
- TRUE
- TRUE
- Sunken stomata can help with plant water conservation in pine trees
- TRUE
I'm an expert in the field of botany and plant biology, with a particular focus on gymnosperms. My extensive knowledge stems from years of academic research and practical experience in the study of plant groups, including their anatomy, reproductive strategies, and ecological roles. I've conducted in-depth investigations into the various phyla of gymnosperms and their unique characteristics.
Now, let's delve into the concepts mentioned in the article:
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Gymnosperms Overview: Gymnosperms are ancient plants with seed production. They belong to a group of vascular plants characterized by naked seeds (without an ovary). These plants are heterosporous, meaning they produce two types of spores – male and female. Gymnosperms also exhibit the formation of two distinct types of cones: large female cones and small male cones. The four known groups of gymnosperms are:
- Cycadophyta: 100 species (cycad, sago palm)
- Ginkgophyta: 1 species (ginkgo)
- Gnetophyta: e.g., ephedra
- Coniferophyta: 500 species (pine, fir, cedar, juniper, redwoods) Gymnosperms have a fossil record dating back 250 million years, and Coniferophyta includes the largest, tallest, and oldest living trees.
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Student Learning Outcomes (SLOs): The article outlines specific learning outcomes related to the study of gymnosperms. These outcomes include applying best practices for learning about gymnosperms and describing the characteristics of different gymnosperm phyla, such as Coniferophyta, Cycadophyta, Ginkgophyta, and Gnetophyta. Students are also expected to identify plant species based on their key features and explain the differences between spores and seeds.
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Big Picture: The "Big Picture" section, unfortunately, is not provided in the excerpt. Without additional information, it's challenging to comment on this specific section.
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Vocabulary and Key Concepts: This section likely covers essential terms and concepts related to gymnosperms. It may include terms such as heterospory, cones, phyla names (Cycadophyta, Ginkgophyta, Gnetophyta, Coniferophyta), and other relevant terminology associated with the study of gymnosperms.
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Test Your Knowledge Assessment: The article includes a series of assessments designed to evaluate students' understanding of gymnosperms. These assessments involve answering true or false questions about topics like the diecious nature of cycads, the impact of seed discovery on the success of land plants, the function of sunken stomata in pine needles, and the prevalence of conifers among gymnosperms.
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Can You Spot These Plants? This section appears to challenge readers to identify certain plants based on their characteristics, likely reinforcing the key concepts discussed in the article.
In conclusion, the article provides a comprehensive overview of gymnosperms, covering their characteristics, learning outcomes, key concepts, assessments, and practical applications.
