Ecology & Environment MCQs for RAS
Practice Ecology & Environment under Science & Tech for RAS with 20 free MCQs in Hindi and English.
RAS — Ecology & Environment
20 Questions • Instant results & explanations • Hindi & English
0 / 20
Question 1 of 20
Which level of ecological organization describes the 'global sum of all ecosystems', effectively acting as the integrated zone of life on Earth?
Question 2 of 20
Assertion (A): Gause's Competitive Exclusion Principle mandates that one species will inevitably outcompete another if both share identical ecological niches. Reason (R): The limitation of physical and biological resources within a shared habitat creates intense survival pressures, preventing indefinite coexistence.
Question 3 of 20
Why is the study of Ecology considered crucial for law enforcement officials like Police Sub-Inspectors?
Question 4 of 20
Which of the following sequences accurately depicts a terrestrial Grazing Food Chain typical to the geographical context of Rajasthan?
Question 5 of 20
The stratospheric ozone layer surrounding the Earth primarily acts as a crucial natural biological shield against which specific type of radiation?
Question 6 of 20
Which concept refers to the maintenance of a stable, self-regulating equilibrium within an ecosystem?
Question 7 of 20
Which of the following is considered the fundamental unit of ecological study, where scientists observe how physiology and behavior adapt to environmental changes?
Question 8 of 20
A group of individuals of the same species living within a specific geographical area, interacting and interbreeding, constitutes a:
Question 9 of 20
The 'Biosphere' integrates which of the following physical spheres of the Earth?
Question 10 of 20
In the broader classification of Biogeochemical Cycles, the Carbon Cycle is fundamentally defined as a:
Question 11 of 20
A disastrous ecological consequence of rapid industrialization, which terrestrial forest biome globally consistently records the absolute highest rates of anthropogenic deforestation and structural fragmentation?
Question 12 of 20
Assertion (A): It is physically impossible for a stable ecosystem to feature an inverted Pyramid of Energy. Reason (R): The universal laws of thermodynamics dictate that energy is inevitably lost as metabolic heat at every successive trophic level.
Question 13 of 20
The primary function of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) is to:
Question 14 of 20
Assertion (A): The Carbon Cycle is primarily classified as a gaseous biogeochemical cycle. Reason (R): The primary reservoir of carbon utilized by living organisms is atmospheric CO2 absorbed during photosynthesis.
Question 15 of 20
What does the term 'Ecological Niche' signify when comparing multiple species in an ecosystem?
Question 16 of 20
A single robust tree serving as the habitat and primary food source for hundreds of herbivorous insects, which in turn host thousands of microscopic parasites, perfectly illustrates a:
Question 17 of 20
Consider the following statement: 'A large regional unit characterized by a major vegetation type and associated fauna found in a specific climate zone.' Which ecological term perfectly matches this definition?
Question 18 of 20
Which of the following defines a 'Population' in ecological terms?
Question 19 of 20
In the hierarchical classification of biotic components, secondary consumers are ecologically synonymous with which of the following terms?
Question 20 of 20