cbse board std 7 science

NCERT Solutions Std 7 Science Reproduction in Plants

Reproduction in Plants Exercise: 1). Fill in the blanks. (a) Production of new individuals from the vegetative part of parent is called vegetative propagation. (b) A flower may have either male or female reproductive parts. Such a flower is called a unisexual flower. (c) The transfer of pollen grains from the anther to the stigma …

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NCERT Solutions Std 7 Science Transportation in Animals and Plants

Transportation in Animals and Plants   Exercise: 1). Match structures given in Column I with functions given in Column II. Column I                                  Column II (i) Stomata                                (a) Absorption of water (ii) Xylem                                  (b) Transpiration (iii) Root hairs                           (c) Transport of food (iv) Phloem                                (d) Transport of water       …

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NCERT Solutions Std 7 Science Physical and Chemical Changes

Physical and Chemical Changes Exercise:   1). Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f ) Digestion of food Physical Changes Chemical Changes Dissolving sugar in water …

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NCERT Solutions Std 7 Science Nutrition in Animals

Nutrition in Animals Exercise: 1). Fill in the blanks: (a) The main steps of nutrition in humans are ingestion, digestion, absorption, assimilation and egestion. (b) The largest gland in the human body is the liver. (c) The stomach releases hydrochloric acid and digestive juices which act on food. (d) The inner wall of the small …

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NCERT Solutions Std 7 Science Nutrition in Plants

Nutrition in Plants Exercise: 1). Why do organisms take food?      Organisms need food for growth and development. Food also provides energy.   2). Distinguish between a parasite and a saprotroph. Parasite Saprotroph 1. A parasite is an organism that takes the food from the living thing on which it survives. 1. An organism that …

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