Free Man and His Environment MCQs with Answers

• A. Xerosere
• B. Hydrophytes
• C. Halophytes
• D. All

Explanation: Xerarch succession takes place in dry areas and the series progress from xeric to mesic conditions.

• A. Physiology
• B. Pulmonology
• C. Morphology
• D. Ecology

Explanation: Option A: Physiology is the study of the functions of living organisms.

• A. Becomes fast
• B. Slows down
• C. Remains same
• D. None of these

Explanation: A decrease in the number of resources will lead to more competition between the individuals in a population and hence lead to the death of…

• A. Soil
• B. Atmosphere
• C. Water
• D. Animals

Explanation: d) Animals: This is the correct option. Animals are biotic components of the environment.

• A. Desert.
• B. Littoral.
• C. Profundal.
• D. All of these.

Explanation: The profundal zone is a deep zone of an inland body of freestanding water, such as a lake or a pond, located below the range of effective…

• A. Biogeochemical cycles
• B. Bioelement cycles
• C. Biochemical cycles
• D. Geochemical cycles

Explanation: Explanation:The nutrient cycles are primarily referred to as "Biogeochemical cycles" because they involve the cycling of nutrients such as…

• A. Population
• B. Community ecology
• C. Community
• D. Autecology

Explanation: [A] Correct definition for population[B] Community ecology;community ecology, study of the organisation and functioning of communities…

• A. Niche
• B. Ecosystem
• C. Habitat
• D. Biosphere

Explanation: A habitat is a place where an organism makes its home. A habitat meets all the environmental conditions an organism needs to survive.

• A. Symbiosis
• B. Predation
• C. Commensalism
• D. Parasitism

Explanation: Mycorrhiza is a mutualistic relationship between fungal hyphae and roots of higher plants.

• A. Food Chain
• B. Food Web
• C. Trophic Level
• D. Food Link

Explanation: A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another; the levels in the…

• A. Role played by many organisms in an ecosystem
• B. Role played by a dead organism in an ecosystem
• C. Role played by community of microorganisms in their ecosystem
• D. Role played by an organism in its ecosystem

Explanation: The niche of an organism is the role that it plays in a community, especially its living conditions and its interaction with other…

• A. Trophic level
• B. Food web
• C. Energy pyramid
• D. Food chain

Explanation: A trophic level refers to a level or a position in a food chain, a food web, or an ecological pyramid.

• A. Symbiosis
• B. Parasitism
• C. Commensalism
• D. Predation

Explanation: Symbiosis is the interaction of two dissimilar organisms, in which both organisms benefit from the interaction.

• A. Community
• B. Ecosystem
• C. Biosphere
• D. Microhabitat

Explanation: A community is a group of interacting species, which live in the same location.

• A. Lithosphere
• B. Hydrosphere
• C. Community
• D. Biosphere

Explanation: The biosphere is the part of an ecosystem which integrates all living organisms and their relationship with one another.

• A. Commensalism
• B. Parasitism
• C. Mutualism
• D. Predation

Explanation: A symbiotic relationship, or symbiosis, is a close and long-term biological interaction between two different species.

• A. Primary successions
• B. Secondary successions
• C. Seres
• D. Xeroses

Explanation: The term specifically used for each individual succession in animal or plant is called seres. Therefore this is the right option here.

• A. Niche
• B. Biome
• C. Ecosystem
• D. Habitat

Explanation: The given statement is the definition of Niche given by Grinnell. Therefore opt A is the right choice here.

• A. T1
• B. T2
• C. T3
• D. T4

Explanation: Herbivores which are the primary consumers belong to trophic level 2.

• A. 5
• B. 3
• C. 6
• D. 4

Explanation: A series of organisms each dependent on the next as a source of food is called a food chain.