What are plants called in a food chain?

• Producers /Autotrophs

• Consumers /Heterotrophs

• Decomposers

• Scavengers

Why might an organism have more than one arrow coming FROM them in a food web?

• More than one organism may eat them.

• They may eat more than one other organism.

• This organism gets its energy from multiple sources.

Match the following

• This is an organism which feeds on, but usually does not kill, a larger organism

• Parasite

• This is an animal that lives by preying on other animals.

• Decomposer

• This is an organism that relies on other organisms for its food and energy supply; heterotroph

• Producer

• This is an organism that supplies matter and energy, also known as an autotroph.

• Consumer

• This is an organism that breaks down and gains nutrients from dead organisms.

• Predator

What happens to the amount of available energy in the pyramid as it moves up through the different levels?

• it increases

• it decreases

• it remains the same

If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?

• 10 Kcal
• 1 Kcal
• 100 Kcal
• 1000 Kcal

Which organism recieves the least amount of energy from the producer?

• Owl
• Grasshopper
• Lilypad
• Mouse

Which organism in the food web shown to the right would

contain the lowest concentration of chemical pollutants?

• producers

• primary consumers

• secondary consumers

• tertiary consumers

If a toxin was introduced to the water of an aquatic ecosystem. Which organism would have the highest accumulation of the toxin in their tissues?

Match the following levels of classification to the pictures:

• Ecosystem

• 
• Organism

• 
• Community

• 
• Population

• 

All the living things in an ecosystem are the ​ (a)   factors. The nonliving things are ​ (b)   .

• biotic
• abiotic

Answer explanation

Bio = life

A = not