In the grasslands, trees do not replace the grasses as a part of an ecological succession because of [UPSC CSE 2013]

(a) insects and fungi
(b) limited sunlight and paucity of nutrients
(c) water limits and fire
(d) None of the above

If a healthy freshwater fish is placed in saltwater, the fish ? [UPSC CAPF 2011]

(a) becomes dehydrated and dies
(b) becomes bloated and dies
(c) suffers from microbial infection and dies
(d) experiences no problem

The ecological niche of an organism relates to

(a) specific habitat of the organism
(b) symbiotic relationship with other organisms
(c) diverse occurrence of a species under different conditions
(d) its interaction with all other – organisms

Bending of shoot of a plant towards light can be referred to as ? [UPSC CAPF 2019]

(a) photonasty
(b) positive phototropism
(c) negative phototropism
(d) photoperiodism

Which of the following parameter of light is NOT required by plants to grow?

(a) Wavelength of light
(b) Intensity of light
(c) Duration of light
(d) Color of light

The study of the relationships between living organisms and their physical environment is known as

(a) Ecosystem
(b) Environment
(c) Ecotone
(d) Ecology

Transition zone of varied natural vegetation occupying the boundary between two adjacent and differing plant communities is known as [UPSC CAPF 2020]

(a) Ecological succession
(b) Ecotone
(c) Ecological niche
(d) Climax

Who coined the word ‘Ecology’?

(a) Ernst Haeckel
(b) Charles Darwin
(c) Gregory Mendel
(d) Eugene Odum

The ecological niche of an organism relates to

(a) specific habitat of the organism
(b) symbiotic relationship with other organisms
(c) diverse occurrence of a species under different conditions
(d) its interaction with all other – organisms

Study of a single species and the environmental factors in its habitat is called

(a) Genecology
(b) Synecology
(c) Autecology
(d) Ethology