Community is
$I.$ Group of independent, interacting populations of same species
$II.$ Group of independent and interacting populations of same species in specific area
$III.$ Group of independent interacting populations of different species in a specific area
$IV.$ Group of independent and interacting populations of different species in different area
Select the correct option
$I, II$ and $IV$
$I, III$ and $IV$
$I, II$ and $III$
Only $III$
The niche of a population is defined as
Ecology is basically concerned with how many basic levels of organisation?
Name the famous plants ecologist
Definitions / Explanation : Ecotype
Select the incorrect statement w.r.t. ecotypes