Ecological Concepts and Interactions

The video tutorial by Justin Diwan covers the study of organisms and populations within ecology. It explains the interaction among organisms and their environment, focusing on four levels of biological organization: organism, population, community, and biome. Key abiotic factors such as temperature, water, light, and soil are discussed, along with their impact on ecosystems. The video also explores biotic factors, homeostasis, and adaptations like migration and hibernation. Population dynamics, including growth models and species interactions like predation and mutualism, are explained to provide a comprehensive understanding of ecological principles.

What is the primary focus of ecology?

• The study of interactions among organisms and their environment

• The study of individual organisms

• The study of chemical processes in organisms

• The study of genetic variations in populations

Which of the following is NOT an abiotic factor affecting ecosystems?

• Water

• Predation

• Light

• Temperature

How does temperature generally change from the equator towards the poles?

• It remains constant

• It decreases

• It fluctuates randomly

• It increases

What is homeostasis in the context of ecology?

• The process of organisms changing their external environment

• The process of organisms increasing their population size

• The process of organisms competing for resources

• The process of organisms maintaining a constant internal environment

Which adaptation strategy involves organisms moving to a more favorable environment temporarily?

• Hibernation

• Suspension

• Migration

• Regulation

What does the term 'natality' refer to in population dynamics?

• The death rate in a population

• The birth rate in a population

• The migration rate in a population

• The growth rate in a population

In which growth model does the population size eventually stabilize?

• Exponential growth

• Cyclic growth

• Logistic growth

• Linear growth

What is predation in ecological interactions?

• When two species compete for the same resources

• When one species is harmed and the other is unaffected

• When one organism feeds on another organism

• When two species benefit from each other

Which interaction involves one species benefiting while the other is neither helped nor harmed?

• Commensalism

• Parasitism

• Competition

• Mutualism

What is mutualism in ecological terms?

• An interaction where neither species benefits

• An interaction where both species benefit

• An interaction where one species benefits and the other is harmed

• An interaction where both species are harmed