Ecology 2.1 and 2.2 Quiz

What is the definition of an ecosystem?

• A system of interacting organisms and their physical environment

• A group of animals living together in a specific area

• A community of plants and animals

• A collection of different species in a habitat

Which of the following is an example of a decomposer in an ecosystem?

• Algae

• Cows

• Tiger

• Earthworm

What is the role of the littoral zone in a lake ecosystem?

• The upper layer where light is sufficient for photosynthesis

• The lower layer that receives little or no light and photosynthesis is absent

• Habitat of phytoplankton, zooplankton, and fishes

• Producing oxygen and providing food and shelters

Where are tropical rainforests located?

• In the temperate regions

• Near the poles

• In the desert regions

• At the equator

What is the role of the emergent layer in a tropical rainforest?

• Producing oxygen and providing food and shelter for insects, crustaceans, frogs, turtles, and fish

• Extend beneath the emergent, rising to 45m

• The tallest trees towering much as 60m above the forest floor

• The layer that gets only 2-5% sunlight

What is the main source of food in the benthic zone of a lake ecosystem?

• Carnivorous plankton

• Phytoplankton

• Zooplankton

• Detritus

In a Pyramid of Biomass, what unit is used to measure the amount of living matter at each trophic level?

• Number of individuals

• Kilocalories per gram

• Joules per trophic level

• Grams per square meter

In a healthy ecosystem, how does the Pyramid of Energy typically appear concerning each trophic level?

• It remains constant across all levels

• It gets wider at higher trophic levels

• It gets narrower at higher trophic levels

• It forms an inverted pyramid shape

What does the Pyramid of Numbers represent in an ecological pyramid?

• The amount of energy at each trophic level
  

• The number of organisms at each trophic level

• The biomass of organisms at each trophic level

• The rate of photosynthesis in an ecosystem

Why does a food chain not consist of more than five trophic levels?

• Insufficient to support further trophic level

• At the fourth and fifth level, only small amount energy left

• All of the above

• Large amount of energy is lost during each transfer