Couplet is a pair of contrasting characters used as tool for identification key to help in identification of newly discovered organism.

Monograph is a specialist work of writing or information on a particular taxon, i.e., family or genus or on aspect of subject, usually by a single author. Main purpose of monograph is to present primary research and original work and thus is non-serial publication, complete in one book (volume) of a finite number of volumes.

Amoeba multiplies by simple mitotic cell divisions giving rise to two daughter Amoebae. Here, the growth is synchronous with reproduction, i.e., increase in number.

Metabolism is total sum of all biological reactions occurring in any living cell, which are absolutely controlled by enzymes. These reactions are of two types breaking down reactions (catabolism, e.g., cell respiration) and synthesing reactions (anabolism, e.g., photosynthesis).

The largest botanical garden in the world is Royal Botanical Garden (RBG, Kew, London) The famous well known botanical gardens in India are

(i) Indian Botanical Garden, Sibpur, Kolkata.

(ii) Lloyd Botanical Garden, Darjeeling.

(iii) Botanical Garden of FRI, Dehradun (UK).

(iv) National Botanical Garden (NBG) Lucknow, UP.