Usman

Tag: category-77

  • The world’s staple cereals such as rice, wheat and maize are:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Gymnosperm cones”,”Brown algae”,”Angiosperm grasses (Poaceae)”,”Mosses”],”correct”:2,”type”:”mcq”,”explain”:”Cereal grains feed most of humanity.”}

  • Cotton fibre used in cloth is:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Algal agar”,”Fungal hyphae”,”Wood tracheids”,”Epidermal hairs of the cotton seed”],”correct”:3,”type”:”mcq”,”explain”:”Gossypium seed trichomes are almost pure cellulose.”}

  • Many traditional medicines are:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Only table salt”,”Plant secondary metabolites (alkaloids, glycosides, oils)”,”Only synthetic plastics”,”Only distilled water”],”correct”:1,”type”:”mcq”,”explain”:”Aspirin traces to willow; morphine to opium poppy; quinine to Cinchona.”}

  • Timber and paper mostly come from:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Insect wings”,”Root hairs”,”Secondary xylem (wood) of trees”,”Pollen”],”correct”:2,”type”:”mcq”,”explain”:”Forestry harvests gymnosperm and angiosperm wood.”}

  • Legume crops are valued because many:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Produce no protein”,”Fix carbon without chlorophyll”,”Host Rhizobium and enrich soil nitrogen”,”Grow only in total darkness”],”correct”:2,”type”:”mcq”,”explain”:”Beans, peas and lentils add protein and can improve soil N.”}

  • Deforestation matters because forests:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Store carbon, protect soils and harbour biodiversity”,”Have no species”,”Stop all rainfall forever if left standing”,”Produce only methane as wood”],”correct”:0,”type”:”mcq”,”explain”:”Clearing releases carbon and destroys habitat.”}

  • Spices such as black pepper and cinnamon are:

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“Synthetic metals”,”Plant parts used for flavour”,”Mineral rocks”,”Types of bacteria”],”correct”:1,”type”:”mcq”,”explain”:”Pepper is a dried fruit; cinnamon is inner bark.”}

  • True or false: Plants produce the oxygen we breathe as a by-product of photosynthesis.

    {“lesson_id”:0,”category_id”:77,”topic”:”Plants And People”,”choices”:[“True”,”False”],”correct”:0,”type”:”true_false”,”explain”:”Photolysis of water releases O2; phytoplankton and land plants both contribute.”}