The correct statements about ozone depletion are: (i) Chlorofluorocarbons (CFCs) are the main cause. (ii) Ozone depletion increases harmful ultraviolet (UV) radiation reaching Earth. (iii) The ozone hole is prominently observed over Antarctica. Ozone depletion does not protect humans from ...
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The student can see distant objects like the blackboard clearly but cannot read nearby objects like the textbook. This indicates difficulty in focusing on near objects, a condition known as long-sightedness (hypermetropia), where the near point of the eye has ...
To obtain an image of magnification M = − 1, the image must be real, inverted and of the same size as the object. This happens when the object is placed at twice the focal length of a convex lens. ...
Auxins are plant hormones that stimulate cell elongation on the side of the shoot away from light, causing the shoot to bend towards light. This process is called phototropism, helping the plant capture sunlight efficiently. The correct answer is (D) ...
Carbon does not have a strong tendency to lose or gain electrons completely. Instead, it has 4 valence electrons and typically shares electrons with other atoms to achieve a stable configuration. The correct answer is D: A is false but ...