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.

Growth in biological terms is characteristic feature of all living organisms. It relates to increase in size by accumulation of protoplasm in the cell thus results in increase in size of the cell. Whereas increase in number of cell by cell division results is the size of individual organism.

Snow is an inanimate (non-living) object, while rolling over snow, it gathers more snow on its surface thus, it increases in size by physical phenomenon but not by biological phenomenon. So, this growth cannot be compared to that seen in living organisms.

In a given habitat, there are existing 20 plant species and 20 animal species. They will of course exhibit the biodiversity of that given habitat because diversity refers to variation in a broad term and can be applied to any area. Whereas biodiversity is a degree of variation of life forms within a specified area.

ICBN has specified certain rules and principles is order to facilitate the study of plants by botanists. It helps in correct positioning of any newly discovered organism through proper identification and nomenclature.

Given below is the taxonomic hierarchy, which is used while classifying any plant Kingdom-Plantae

Division-phyta

Class-ae

Order-ales

Family-eae/ceae

Genus-First name of organism usually carrying Latin word and written in italics.

Species-Second word of scientific name, also written in italics.