Levels of Organization in a Community or Ecosystem

The video tutorial discusses the levels of organization in ecosystems, focusing on the roles of producers, consumers, and the dynamics of food webs and chains. It explains how photosynthetic organisms produce biomass, which is consumed by primary, secondary, and tertiary consumers. The tutorial also covers predator-prey relationships and how population sizes fluctuate in stable communities due to these interactions. The video uses examples of grass, beetles, moles, frogs, snakes, and owls to illustrate these concepts, highlighting the cyclical nature of population changes over time.

What role do photosynthetic organisms play in an ecosystem?

• They are secondary consumers.

• They are primary consumers.

• They are tertiary consumers.

• They are producers of biomass.

In a food web, which organisms are considered primary consumers?

• Owls and snakes

• Beetles and crickets

• Moles and frogs

• Grass plants

What is the primary function of arrows in a food chain diagram?

• To display the color of each organism

• To show the size of each organism

• To indicate the direction of energy flow

• To represent the speed of consumption

Which of the following best describes a predator in a food chain?

• An organism that kills and eats other animals

• An organism that decomposes organic material

• An organism that produces its own food

• An organism that is eaten by others

What happens to the snake population when the frog population decreases?

• The snake population decreases.

• The snake population remains constant.

• The snake population increases.

• The snake population becomes extinct.