our environment — Science STD 10 — Question

The cells involved in sexual reproduction are known as .......... (sperms, ovaries, gametes/ germ cells)

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

In case of a mirror or lens, the ratio of the image height to object height is called ________. (Magnification, Refraction, Dispersion)

The distance between the eye lens and the retina is known as the..........

The size of ________ is determined by the rates of birth and death.(Population, Ecosystem, Community)

……….. is formed by interaction between biotic community and abiotic factors. (environment, earth, Ecosystem)

In pancreatic juice ,......... enzyme is present for digestion of lipid.(pepsin, trypsin. lypase)

Use of _________ chemical is hazardous for ozone layer. (CFC, Nitrous oxide, Carbon dioxide)

When a ray of light travels from water to air, its speed _______. (Increases, Decreases, Remains the same)

The eyes of …………… are very simple and in the form of a dot. (hydra, Planaria, buds)