We are advised to take iodised salt because Iodine is essential for the synthesis of thyroxin hormone. Thyroxin regulates carbohydrate, protein and fat metabolism in the body. Thyroxin provide best balance for growth in the body. CBSE Class 10 Science Question ...
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(i) Anannya’s answer is incorrect. Three-pin plugs are used for earthing, not to reduce heating. (ii) A fuse prevents damage by melting and breaking the circuit when excessive current flows, protecting appliances from short circuits. cbse class 10 previous year question ...
It is wrong to say that plants do not produce excretory products. Plants excrete wastes differently from animals. Oxygen is released through stomata, excess water by transpiration, and other wastes are stored in dead cells, gums, resins, vacuoles, or removed ...
The correct option is (B). The correct statements are (ii), (iii), (iv). Ozone is poisonous but in the stratosphere, it forms a protective layer shielding Earth from harmful ultraviolet rays that cause skin cancer and damage living tissues. Science important questions ...
(a) Leads to infertility due to improper sperm formation. (b) Blocks sperm transport causing sterility. (c) No seminal fluid production; sperm inactive. (d) No pregnancy occurs; menstrual cycle continues. (e) Poor foetal nourishment, possibly causing miscarriage. cbse class 10 previous year ...