What is the common name for living forms?

What is meant by living? Give any four defining features of life forms.

Two plants can be concluded to belong to the same species if they:

$I -$ Increase in number
$II -$ Differentiation
$III -$ Metabolism
$IV -$ Reproduction
$V -$ Increase in mass
Identify the two twin characteristics of growth from the above.

Which two points are known as the twin characteristics of growth?
$(i)$ Increase in mass $(ii)$ Differentiation $(iii)$ Increase in number of individuals $(iv)$ Response to stimuli

Botany presents the changes in the internal and external structure of plants in terms of ..........