Responses and Energy Flow in Ecosystems

This video introduces the final unit of AP Biology, focusing on ecology. It covers the basics of ecology, including the relationships between organisms and their environments. The video delves into behavioral ecology, examining how behaviors evolve due to ecological pressures. It also explores how organisms detect and respond to stimuli, both internally and externally. The concept of energy flow through ecosystems is discussed, highlighting the differences between autotrophs and heterotrophs, and the impact of energy availability on ecosystems.

What does ecology primarily study?

• The interaction between organisms and their physical environment

• The genetic makeup of organisms

• The cellular structures of plants

• The chemical reactions within animal species

Which type of ecology focuses on the evolutionary basis for behavior?

• Community ecology

• Population ecology

• Behavioral ecology

• Molecular ecology

What is the primary focus of community ecology?

• Interactions among different species

• Interactions within a species

• Study of individual organisms

• Genetic variations within a population

What can trigger a behavioral response in organisms?

• Only internal stimuli

• Only external stimuli

• Internal or external stimuli

• Changes in the ecosystem

What does intraspecific communication involve?

• Only among animals

• Between different species

• Within the same species

• Only among plants

What is the role of natural selection in behavior?

• It has no role

• It influences behavioral traits

• It decreases genetic diversity

• It only affects physical traits

What percentage of energy is typically transferred to the next trophic level?

• About 75%

• About 10%

• About 25%

• About 50%

Which organisms are capable of photosynthesis?

• Endotherms

• Ectotherms

• Autotrophs

• Heterotrophs

Which factor can affect the energy flow in ecosystems?

• All of the above

• Climatic changes

• Behavioral adaptations

• Energy availability

Which type of organisms do not regulate their body temperature through metabolic processes?

• Heterotrophs

• Endotherms

• Autotrophs

• Ectotherms