Question

plants are useful to human beings explain this topic keeping in mind the concept of excretion in plants

Answer 1

xylem and phloem part of plants

Answer 2

please mark as brainliest.

 In unicellular organisms, waste products are discharged directly through the surface of the cell.

Green plants produce carbon dioxide and water as respiratory products. In green plants, the carbon dioxide released during respiration gets utilized during photosynthesis. Oxygen is a by product generated duringphotosynthesis, and exits through stomata, root cell walls, and other routes. Plants can get rid of excess water by transpiration andguttation. It has been shown that the leaf acts as an 'excretophore' and, in addition to being a primary organ of photosynthesis, is also used as a method of excreting toxic wastes via diffusion. Other waste materials that are exuded by some plants — resin, saps, latex, etc. are forced from the interior of the plant by hydrostatic pressures inside the plant and by absorptive forces of plant cells. These latter processes do not need added energy, they act passively
. However, during the pre-abscission phase, the metabolic levels of a leaf are high.[2][3] Plants also excrete some waste substances into the soil around them.[4]

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Name any five excreta of plant that are useful to human?  

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EXPERT ANSWERS

GSENVIRO | CERTIFIED EDUCATOR

Human beings make use of a number of excreta (waste products of the metabolism) produced by plants. Here are a few of them:

Oxygen is the most useful excreta of plants and is essential for life on Earth. Oxygen is produced through the process of photosynthesis, in which, plants utilize carbon dioxide and water (in the presence of sunlight) and produce oxygen and glucose.Leaves and bark of the plants also store waste products and are periodically shed off. These leaves and barks and other plant products/wastes are converted to manure and is used in agriculture and gardening.Tannin is a waste product of plants and is stored in leaves and bark. Tea leaves contain tannins and are used around the world to make tea.Certain essential oils are also generated as waste products by plants and are stored in leaves. Some common examples include Basil, lemon, eucalyptus, etc. Many of these leaves are used in our food and/or for fragrance. Some plants generate toxic waste products, which are useful to human beings. Caffeine, morphine and nicotine are examples of such wastes and are used in beverages, medicines, etc.