Ecosystem Dynamics and Interactions Among Organisms

The video tutorial by Mr. Lara explores ecosystems, focusing on the interaction between biotic and abiotic factors. It explains how organisms and populations compete for limited resources, highlighting intraspecific and interspecific competition. The concept of niches and their role in competition is discussed. Additionally, the video covers mutualism, where species benefit from symbiotic relationships. The tutorial concludes with a review of key concepts, emphasizing the importance of understanding these interactions for ecosystem survival.

What happens to an ecosystem if a species becomes extinct?

• Nothing changes

• New species immediately replace the extinct one

• It affects the entire ecosystem

• Only the extinct species is affected

Which of the following is a biotic factor in an ecosystem?

• Plants

• Temperature

• Water

• Sunlight

What is the role of abiotic factors in an ecosystem?

• They are not important

• They are living organisms

• They provide energy and nutrients

• They only affect marine ecosystems

Why do organisms compete for resources in an ecosystem?

• To establish dominance

• Resources are limited

• Resources are unlimited

• To avoid mutualism

What is a niche in an ecosystem?

• A type of food source

• The role of an organism

• A competition strategy

• A type of habitat

What is intraspecific competition?

• Competition between different species

• Competition for mutualism

• Competition for abiotic factors

• Competition within the same species

Which example illustrates interspecific competition?

• Two male lions fighting

• A lion hunting a zebra

• Two plant species competing for sunlight

• A bee pollinating a flower

What is mutualism?

• A relationship where both species are harmed

• A relationship where one species benefits

• A competition for resources

• A symbiotic relationship where both species benefit

Which of the following is an example of mutualism?

• Two plants competing for sunlight

• A plant and insect benefiting each other

• A bird eating a worm

• A lion hunting a zebra

How do organisms in mutualistic relationships depend on each other?

• They avoid each other

• They provide benefits to each other

• They compete for the same resources

• They harm each other