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  1. Ferns and horsetails: first water vascular system, so could grow taller, first plants with roots, stems, and trunks. Gymnosperms: first plants with seeds, so could reproduce and spread more easily. Angiosperms: first plants with flowers, so attracted pollinators and spread plants more easily.

  2. Study with Quizlet and memorize flashcards containing terms like gametophyte, sporophyte, flowering plants and more.

  3. A flexible plant cell type that occurs in strands or cylinders that support young parts of the plant without restraining growth. companion cell A type of plant cell that is connected to a sieve-tube member by many plasmodesmata and whose nucleus and ribosomes may serve one or more adjacent sieve-tube members.

  4. Aug 25, 2023 · Plant biology, also known as botany, is a branch of biology that focuses on the scientific study of plants. It involves understanding the structure, function, evolution, classification, and distribution of plants, as well as their interactions with the environment and other organisms. Plant biology plays a vital role in agriculture, horticulture, forestry, ecology, and environmental […]

  5. Study biology online for free by downloading OpenStax's college Biology 2e book and using our accompanying online resources including a biology study guide.

  6. Free-Response Questions and Scoring information Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at [email protected] .

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  8. Study biology online free by downloading OpenStax's Concepts of Biology book and using our accompanying online resources including a biology study guide.

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