Biomagnification and Energy Transfer Concepts

This video tutorial reviews key concepts for a Unit 1B test on food webs and energy. It covers biotic and abiotic factors, types of symbiosis, competition, and niches. The video explains primary productivity, energy flow through ecosystems, and the 10% rule. It also discusses biomagnification and its ecological impacts.

What is the primary focus of the Unit 1b test?

• Chemical reactions

• Mathematical equations

• Food webs and energy

• Historical events

Which of the following is an example of mutualism?

• Bees pollinating flowers

• Fleas on dogs

• Moss on oak trees

• Mistletoe on trees

What is the term for competition between different species?

• Intraspecific competition

• Interspecific competition

• Resource partitioning

• Symbiotic competition

What does NPP stand for in the context of primary productivity?

• Net Primary Productivity

• Natural Plant Production

• Nutrient Production Process

• Net Plant Productivity

Which factor does NOT affect primary productivity?

• Wind speed

• Moisture availability

• Temperature

• Precipitation

What is the ultimate source of energy in an ecosystem?

• The Ocean

• The Earth

• The Sun

• The Moon

Which type of organism breaks down dead material in an ecosystem?

• Decomposers

• Carnivores

• Herbivores

• Omnivores

According to the 10% rule, how much energy is typically passed from one trophic level to the next?

• 100%

• 50%

• 1%

• 10%

What is biomagnification?

• The decrease of toxin concentration as it moves up the food chain

• The increase of toxin concentration as it moves up the food chain

• The decrease of energy as it moves up the food chain

• The increase of energy as it moves up the food chain

Which of the following is a famous example of a toxin that biomagnifies?

• O2

• H2O

• CO2

• DDT