Ecological Concepts in AP Biology Review

This video provides a comprehensive review of ecology concepts for AP Biology, covering organismal responses to environmental changes, energy flow in ecosystems, population ecology, community interactions, and ecosystem disruptions. It emphasizes the importance of understanding these concepts for the AP Biology exam.

What is the primary focus of the ecology unit in AP Biology?

• Historical ecology

• Laboratory experiments

• Mathematical equations

• Conceptual understanding

Which of the following describes phototropism?

• Random movement in response to stimuli

• Plants responding to day length

• Movement towards chemical stimuli

• Directional growth towards light

What is the difference between taxes and kinesis?

• Both are random movements

• Taxes is directional movement; kinesis is random

• Both are directional movements

• Taxes is random movement; kinesis is directional

How do endotherms regulate their body temperature?

• By moving into the sun

• By changing their color

• Through external heat sources

• Through metabolic heat production

What happens to energy as it moves up trophic levels?

• It increases by 90%

• It remains constant

• It decreases by 90%

• It doubles

Which growth model assumes unlimited resources?

• Logistic growth model

• Diversity index model

• Carrying capacity model

• Exponential growth model

What is the carrying capacity of a population?

• The number of species in a community

• The rate of population growth

• The initial population size

• The maximum number of individuals an environment can support

Which type of symbiotic relationship benefits both organisms?

• Competitive

• Mutualistic

• Commensalistic

• Parasitic

What is a keystone species?

• A species that is the smallest in size

• A species that is the most abundant

• A species that has a large impact on its ecosystem

• A species that is at the top of the food chain

What is the primary cause of species becoming endangered?

• Introduction of new diseases

• Habitat loss

• Invasive species

• Climate change