The study of inter-relationship between living organisms and their environment is called
Ecosystem
Phytogeography
Ecology
Phytosociology
Study of environment and animals relation
$A$ : Population ecology is a link of ecology to population genetics and evolution.
$R$ : Natural selection operates at population level to evolve the desired traits.
Define population and community.
Define self sustainability.
Ecological hierarchy comprises, which of the following sequence