Structure of Ecosystems

What is the term used to describe the gradual process of change in an ecosystem over time?

• Succession

• Management

• Sustainability

• Conservation

Which term refers to the interconnected food chains in an ecosystem?

• Nutrient cycles

• Food webs

• Ecological threats

• Urban management

What is an ecosystem?

• A system of only plants

• A dynamic, stable system of interactions between living and non-living components

• A collection of non-living components

• A system of only animals

What is the basic definition of photosynthesis?

• The process by which green plants use light energy to produce food.

• The process by which animals convert food into energy.

• The process of water evaporation in plants.

• The process of nutrient absorption in roots.

Why is photosynthesis considered a crucial process for life on Earth?

• It captures the sun’s energy, supports all living things, and produces oxygen.

• It only produces oxygen, which is necessary for breathing.

• It captures the sun’s energy but does not affect gas proportions.

• It only supports plant life and has no impact on other organisms.

What process do green plants use to convert sunlight into energy?

• Respiration

• Photosynthesis

• Fermentation

• Digestion

Which of the following is the correct sequence of energy flow in the energy cycle?

• Sunlight → Decomposers → Herbivores → Carnivores

• Sunlight → Green plants → Herbivores → Carnivores

• Sunlight → Carnivores → Herbivores → Decomposers

• Sunlight → Herbivores → Green plants → Decomposers

What is the role of decomposers in the energy cycle?

• They produce energy from sunlight.

• They consume herbivores.

• They break down dead organisms and recycle nutrients.

• They are primary consumers.

What is the primary role of producers in an ecological pyramid?

• They eat both plants and animals.

• They are meat eaters.

• They produce their own food through photosynthesis.

• They decompose dead plants and animals.

Which level of the ecological pyramid consists of animals that obtain energy by eating plants?

• Tertiary Consumers

• Secondary Consumers

• Primary Consumers

• Decomposers