All Free Forestry MCQs with Answers

• A. Both (a) & (b)
• B. The litter and consequently the humus layers is thick
• C. The produces in forest are actual at different strata from the ground level to the canopy of trees.
• D. None of these

Explanation: A forest ecosystem has vertical stratification, with producers occupying layers from ground vegetation to the tree canopy, and its shaded…

• A. Riverain
• B. Estuarine
• C. All of the above
• D. Coniferous

Explanation: Riverain, estuarine, and coniferous communities can each represent distinctive ecological succession sequences governed by their site…

• A. Primary succession
• B. Secondary succession
• C. None of these
• D. Both (a) & (b)

Explanation: Primary succession begins on a previously unoccupied or soil-less substrate, whereas secondary succession follows disturbance where soil…

• A. Monoclimax
• B. All of the above
• C. Sub-climax
• D. Disclimax
• E. Polyclimax

Explanation: Climax vegetation may be viewed as a single climatic climax in monoclimax theory or as several climaxes under polyclimax theory; subclimax…

• A. Environmental changes produced as a result of reaction to the community become favorable for new species of plants
• B. Both (a) & (b)
• C. Physiographic factors produce change in the habitat like flooding of plains, soil erosion, change in temperature, rain etc.
• D. None of these

Explanation: Succession may result from changes caused by the existing community, as well as external physiographic changes such as flooding, erosion…

• A. Inorganic
• B. Organic
• C. Climatic
• D. All of the above

Explanation: Abiotic components include inorganic substances, climatic conditions and organic compounds such as humus and other non-living organic…

• A. All of the above
• B. Macroconsumers (Heterotrophs)
• C. Microconsumers (Saprotrophs/Decomposers)
• D. Producers (Autotrophy)

Explanation: Biotic components include producers that make food, macroconsumers that feed on organisms, and microconsumers or decomposers that break…

• A. Lithosphere
• B. All of the above
• C. Atmosphere
• D. Hydrosphere

Explanation: The non-biotic environment can be viewed as the lithosphere, hydrosphere and atmosphere, representing land, water and air.

• A. Population ecology
• B. Community ecology
• C. All of the above
• D. Ecosystem ecology

Explanation: Synecology studies groups of organisms and is commonly discussed through population, community and ecosystem ecology.

• A. Both (a) & (b)
• B. Biotic
• C. Abiotic
• D. None of these

Explanation: An ecosystem has two broad components: abiotic factors such as soil, water and climate, and biotic organisms such as producers, consumers…

• A. Climatic
• B. All of the above
• C. Topography
• D. Edaphic factors

Explanation: Abiotic factors include climatic conditions, edaphic or soil conditions, and topographic features such as slope and elevation.

• A. Autecology
• B. Synecology
• C. Both (a) & (b)
• D. None of these

Explanation: Ecology is traditionally divided into autecology, which studies individual species, and synecology, which studies groups or communities.

• A. Tertiary Production
• B. Secondary Production
• C. Net Production (NP)
• D. Gross Production (GP)

Explanation: Gross production includes the total energy fixed by producers, whereas net production is gross production after respiratory losses and…

• A. Trophic levels
• B. Pyramid of energy
• C. Pyramid of number
• D. xA. Pyramid of biomass

Explanation: A pyramid of biomass represents the total mass of living organisms at each trophic level.

• A. Both (a) & (b)
• B. Biotic factors
• C. Abiotic factors
• D. None of these

Explanation: An ecosystem is shaped by both abiotic factors, such as light, temperature and soil, and biotic factors, such as plants, animals and…

• A. Grass-bird-insect-snake
• B. Grass-insect-bird-snake
• C. Snake-bird-insect-grass
• D. Grass-snake-bird-insect

Explanation: The sequence follows energy transfer from a producer to successive consumers: grass is eaten by the insect, the insect by the bird, and…

• A. Producers
• B. Tertiary consumers
• C. Primary consumers
• D. Secondary consumers
• E. Decomposers

Explanation: Bacteria and fungi break down dead organic matter and release nutrients back into the ecosystem, so they are decomposers.

• A. Elton
• B. Odum
• C. Reiter
• D. None of these

Explanation: Charles Elton introduced the ecological pyramid concept, particularly the pyramid of numbers, in studies of food chains and animal…

• A. Trophic level 1st and herbivores
• B. Primary consumers and herbivores
• C. Primary carnivore and trophic level 2nd
• D. Secondary consumer and herbivores

Explanation: Primary consumers are herbivores because they feed directly on producers, so these terms describe the same trophic group.

• A. Producer
• B. Biomass
• C. Solar energy
• D. Carbohydrates

Explanation: Solar energy is the ultimate energy source for most ecosystems because producers capture it through photosynthesis.