Ecosystem

What is an ecosystem?

• A community of non-interacting organisms and their physical environment.

• A biological community of interacting organisms and their chemical environment.

• A biological community of interacting organisms and their physical environment.

• A community of non-interacting organisms and their chemical environment.

What does the picture show?

• A Food Web
• An Ecosystem
• A Food Chain
• A nice scenery

Animals that feed on plants are at least in which of the following?

• first trophic level

• second trophic level

• third trophic level

• fourth trophic level

Which of the following groups are abiotic?

• bird, fish, tree, frog

• shark, manatee, fly, lizard

• water, shark, tree, soil

• water, sun, 98 degrees, soil

Organisms which feed on dead organisms, waste of living are called as

• Chemotrophs

• carnivores

• Detritivores

• Decomposers

Study of inter-relationship between organisms and their environment is

• Ecology

• Ecosystem

• Phytogeography

• Ethology

Organisms who feed directly on producers are called

• consumers

• primary consumers

• secondary consumers

• none

Which of the following is NOT a type of forest ecosystem?

• Tropical Rainforest

• Grassland

• Boreal forest

• Temperate forest

What role do wetlands play in an aquatic ecosystem?

• Increase CO2 levels

• Serve as a habitat for large predators

• Act as a natural water filter and improve water quality

• Increase desertification

Which of the following best describes the energy flow in an ecosystem?

• Energy flows in a cyclic manner

• Energy flows unidirectionally from one trophic level to next

• Energy is stored indefinitely within the ecosystem

• Energy flows from secondary consumers to producers