life processes — Science STD 10 — Question

When a battery is connected in a circuit, in the external circuit, electric current flows from the ............... terminal to the ......... terminal of the battery. (positive, negative, zero, negative-positive)

In human red blood cells, respiratory pigment is ……….(haemoglobin, chlorophyll)

......... is used in the preparation of tincture iodine. (Ethanol, methanol, propanon)

__________ is a growth-inhibitor hormone of plants. (Abscisic acid, Auxin, Cytokinin)

.......... light, while passing through a prism, does not disperse. (Monochromatic, dicbromalic, none)

_________ are substances that cause a reaction to proceed at a higher rate without the reaction itself being affected.(Catalysts, Reactants, Products)

An old person suffering from near-sightedness and a far-sightedness uses........to rectify his vision. (spectacles with bi-focal lenses, concave, convex)

The digestion of food particle in Amoeba occurs in …….. (Mito chondria, Cell wall, food vacuole)