IB Bio Ch 4.1-4.2 Quiz

A ____________ is a group of organisms living in the same environment at the same time who are capable of interbreeding.

• Population

• Community

• Species

• Habitat

Autotrophs

• ingest organic matter and then break it down

• secret enzymes externally and then absorb broken down products

• obtain their food from external sources

• synthesize their own food

Detritovores

• ingest organic matter and then break it down

• secret enzymes externally and then absorb broken down products

• obtain their food from external sources

• synthesize their own food

Food chains are __________, whereas food webs are ___________.

• circular; linear

• circular; branching

• linear; branching

• branching; linear

Which sequence shows trophic levels in the correct order?

• primary consumer, secondary consumer, producer, tertiary consumer

• producer, primary consumer, secondary consumer, tertiary consumer

• producer, tertiary consumer, primary consumer, secondary consumer

• primary consumer, producer, secondary consumer, tertiary consumer

When members of a food chain die, they are broken down by

• producers

• primary consumers

• secondary consumers

• decomposers

The initial source of all energy for communities comes from

• Producers

• Water

• Sunlight

• Nutrients

Which of the following contribute to energy loss between trophic levels?

• material not consumed

• material not digested

• heat

• all of the above

Which number best describes the percentage of energy which is successfully transferred to the next trophic level?

• 5%

• 10%

• 50%

• 80%

___________ can enter and leave an ecosystem, but __________ must be recycled.

• energy; nutrients

• nutrients; energy

• organisms; energy

• nutrients; organisms