Free Forest Ecology MCQs with Answers

• A. Top consumers
• B. Secondary consumers
• C. Photo synthesizers
• D. Primary consumers

Explanation: Food chains begin with photosynthesizers, or producers, which convert solar energy into chemical energy.

• A. Primary producer
• B. Secondary Producer
• C. Decomposer
• D. Apex of food pyramids

Explanation: The sequence is plant, insect, frog, snake and peacock, making the peacock the highest consumer in the stated chain.

• A. 3
• B. 3 or 4
• C. 2
• D. 1

Explanation: Most natural food chains contain about three or four trophic levels because substantial energy is lost at every transfer.

• A. Primary and secondary consumers are similar
• B. The biotic components are almost similar
• C. Both biotic and abiotic components are different
• D. The abiotic components are almost similar

Explanation: A grassland and a pond differ in both their physical conditions, such as soil versus water, and their living communities, such as…

• A. Green plant
• B. ATP
• C. Sugar made by plant
• D. Sun

Explanation: The Sun is the primary energy source for nearly all ecosystems, as producers capture its light through photosynthesis.

• A. Grassland with scattered trees
• B. Desert
• C. Tropical rain forest
• D. Dense forest with close canopy

Explanation: Savannahs are tropical or subtropical grasslands in which grasses dominate but trees occur in a scattered pattern.

• A. Gross productivity
• B. Primary productivity
• C. Secondary productivity
• D. Net productivity

Explanation: Secondary productivity is the rate at which consumers store assimilated food energy as new biomass.

• A. Lake
• B. Forest
• C. Grassland
• D. Rice-field

Explanation: A rice field is maintained and managed by humans, so it is an artificial or man-made ecosystem.

• A. Carnivores
• B. Herbivores
• C. Producers
• D. Decomposers

Explanation: The tip of a typical ecological pyramid represents the highest trophic level, occupied by top carnivores.

• A. Number
• B. Energy
• C. Biomass
• D. Both (a) and (c)

Explanation: A pyramid constructed by counting organisms at each trophic level is called a pyramid of numbers.

• A. Elton
• B. Heackel
• C. Lindeman
• D. Schimper

Explanation: Raymond Lindeman formulated the ten percent law, which describes the approximate transfer of energy from one trophic level to the next.

• A. Epilimnion
• B. Metalimnion
• C. All of the above
• D. Hypolimnion

Explanation: The hypolimnion is the deep, cold layer of a pond or lake and normally experiences the least temperature variation.

• A. Food chain will be effected
• B. Primary consumers will grow
• C. Algae will get more grow luxuriantly
• D. No effect will be seen

Explanation: Phytoplankton are the main producers at the base of most marine food chains, so their destruction would disrupt energy transfer to…

• A. Producer
• B. Primary consumer
• C. Secondary consumers
• D. Decomposers

Explanation: Herbivores feed directly on producers such as green plants and algae, so they occupy the primary-consumer level.

• A. 4
• B. 2
• C. 3
• D. 1

Explanation: In an upright biomass pyramid, producers form the broad base at position 1, while herbivores are the first consumers above them at…

• A. Lentic biota
• B. Latic biota
• C. Abiotic
• D. None of these

Explanation: Lakes and ponds are lentic ecosystems, meaning their water is standing or still.

• A. Pond ecosystem
• B. Forest ecosystem
• C. Grassland ecosystem
• D. Lake ecosystem

Explanation: Among the listed ecosystems, forests generally have the highest primary productivity because their dense vegetation captures substantial…

• A. Producers
• B. Decomposers
• C. All of the above
• D. Consumers

Explanation: Biotic components are the living parts of an ecosystem: producers make food, consumers obtain energy by feeding, and decomposers break…

• A. Producers
• B. Carnivores
• C. Herbivores
• D. Decomposers

Explanation: Producers introduce energy into an ecosystem by converting solar energy into chemical energy through photosynthesis.

• A. Mountain
• B. Ocean
• C. Forest
• D. Desert

Explanation: The ocean is commonly regarded as the most stable ecosystem because its enormous size and water volume moderate temperature and other…