Mindblown: a blog about philosophy.

  • The oxygen released in photosynthesis comes mainly from:

    {“lesson_id”:5734,”category_id”:0,”topic”:””,”choices”:[“ATP”,”Glucose”,”Carbon dioxide”,”Water”],”correct”:3,”type”:”mcq”,”explain”:”Splitting of water (photolysis) in the light reaction releases O₂.”}

  • True or false: Stems never store food.

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“True”,”False”],”correct”:1,”type”:”true_false”,”explain”:”Many stems store food, including tubers, rhizomes and corms.”}

  • A grape tendril is typically a modified:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Root”,”Seed”,”Anther”,”Stem”],”correct”:3,”type”:”mcq”,”explain”:”Many tendrils (e.g. grape) are stem branches specialised for climbing.”}

  • Internodes are the stem regions:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Inside the root cap”,”Of the flower ovary”,”Of the leaf blade”,”Between two successive nodes”],”correct”:3,”type”:”mcq”,”explain”:”An internode is the length of stem between two nodes.”}

  • The tissue that adds girth in a dicot stem is the:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Stomatal guard cells”,”Vascular cambium”,”Spongy mesophyll”,”Root cap”],”correct”:1,”type”:”mcq”,”explain”:”Vascular cambium produces secondary xylem inward and secondary phloem outward.”}

  • Lenticels on woody stems mainly allow:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Seed dispersal”,”Water absorption from soil”,”Pollination”,”Gas exchange”],”correct”:3,”type”:”mcq”,”explain”:”Lenticels are pores in bark that permit diffusion of gases to living tissues.”}

  • A rhizome is:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“A tap root”,”A leaf tendril”,”An underground stem”,”A fruit”],”correct”:2,”type”:”mcq”,”explain”:”Ginger and banana have horizontal underground stems called rhizomes.”}

  • A potato tuber is a modified:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Leaf”,”Root”,”Stem”,”Flower”],”correct”:2,”type”:”mcq”,”explain”:”Eyes of a potato are axillary buds, showing it is a swollen underground stem (tuber).”}

  • Vascular bundles in a typical monocot stem are:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Confined to the root”,”Absent”,”In one ring with cambium”,”Scattered”],”correct”:3,”type”:”mcq”,”explain”:”Monocot stems generally have scattered closed bundles without a vascular cambium.”}

  • Vascular bundles in a typical dicot stem are arranged:

    {“lesson_id”:5818,”category_id”:0,”topic”:””,”choices”:[“Only in the pith”,”Scattered in the ground tissue”,”Only in the epidermis”,”In a ring”],”correct”:3,”type”:”mcq”,”explain”:”Dicot stems usually have bundles in a ring, allowing a vascular cambium to form.”}

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