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  2. Botany - Wikipedia

    en.wikipedia.org/wiki/Botany

    Botany, also called plant science or phytology, is the branch of natural science and biology studying plants, especially their anatomy, taxonomy, and ecology. [1] A botanist , plant scientist or phytologist is a scientist who specialises in this field.

  3. Science (UIL test) - Wikipedia

    en.wikipedia.org/wiki/Science_(UIL_test)

    The first 20 questions involve biology, the second twenty questions involve chemistry, and the final twenty questions involve physics. No time warning is given, except that tests cannot be turned in until the proctor announces that 30 minutes have passed. The questions may be answered in any order; there is no penalty for skipping questions.

  4. Thorns, spines, and prickles - Wikipedia

    en.wikipedia.org/wiki/Thorns,_spines,_and_prickles

    Prickles on a blackberry branch. In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called spinose teeth or spinose apical processes), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory.

  5. Plant taxonomy - Wikipedia

    en.wikipedia.org/wiki/Plant_taxonomy

    Plant taxonomy is the science that finds, identifies, describes, classifies, and names plants. It is one of the main branches of taxonomy (the science that finds, describes, classifies, and names living things). Plant taxonomy is closely allied to plant systematics, and there is no sharp boundary between

  6. Evolutionary history of plants - Wikipedia

    en.wikipedia.org/wiki/Evolutionary_history_of_plants

    Land plants evolved from a group of freshwater green algae, perhaps as early as 850 mya, [3] but algae-like plants might have evolved as early as 1 billion years ago. [2] The closest living relatives of land plants are the charophytes, specifically Charales; if modern Charales are similar to the distant ancestors they share with land plants, this means that the land plants evolved from a ...

  7. Plant cell - Wikipedia

    en.wikipedia.org/wiki/Plant_cell

    Structure of a plant cell. Plant cells are the cells present in green plants, photosynthetic eukaryotes of the kingdom Plantae.Their distinctive features include primary cell walls containing cellulose, hemicelluloses and pectin, the presence of plastids with the capability to perform photosynthesis and store starch, a large vacuole that regulates turgor pressure, the absence of flagella or ...