(ii) Photoperiod affects reproduction in seasonal breeders: Both plants and animals are influenced by the duration of light (photoperiod) for their reproductive cycles.

(iii) All organisms are ‘aware’ of their surroundings: Awareness and response to environmental stimuli (physical, chemical, or biological) is a defining property of all living organisms, from prokaryotes to complex eukaryotes.

(iv) Human being is the only organism who is aware of himself: While all organisms have consciousness, "self-consciousness" is a unique property attributed to humans.

(v) Living organisms are self-replicating, evolving and self-regulating interactive systems capable of responding to external stimuli: This is a comprehensive definition of biological life.