1.

Differentiate between the following : (i) Growth in plants and growth in animals (ii) Growth in unicellular organisms and growth in multicellular organisms (iii) Catabolism and anabolism.

Answer»

(i) Growth in plants and growth in animals

Growth in plantsGrowth in animals
Plants grow faster and continuously throughout their life span.Animals grow slowly and after reaching certain size and age, animals stop growing.

(ii) Growth in unicellular organisms and growth in multicellular organisms

Growth in unicellular organismsGrowth in multicellular organisms
Growth can be observed in only in − vitro cultures.Growth can be easily observed in in − vitro as well as in in − vivo.

(iii) Catabolism and anabolism.

AnabolismCatabolism
The biochemical reactions which are concerned with the synthesis of complex substances from simple substances are collectively called anabolism. E.g., photosynthesis.The biochemical reactions which are concerned with breakdown of complex organic substances into simple substances are collectively called catabolism. E.g., respiration.


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