Ecology Mastery Assessment MC

First name

Last name

Period

• 1
• 2
• 4
• 6

Which of these organisms is an autotroph? Check ALL autotrophs!

• sunflower
• tree
• cow
• bear
• shark

Why do you have to keep eating? (read carefully!)

• I need energy to stay alive
• The energy I eat gets used up and lost as heat
• As I grow and repair/replace dead cells, my new mass comes from my food, about 10% of what I eat becomes more of me
• all of these options are reasons I need to keep eating!

Symbiotic relationship where both organisms are helped (benefit)

• Mutualism
• Parasitism
• Commensalism
• Competition
• Predation

Check off ALL of the boxes of the things that put more CO2 into the air:

• burning fossil fuels
• burning wood
• your breathing
• volcanoes
• the process of decomposition

Which of these is the only type of organism that can take Nitrogen out of the atmosphere (N2) and use it?

• Heterotrophs
• Autotrophs
• Nitrogen Fixing Bacteria
• Fungi

How do heterotrophs get the nitrogen they need to live and grow?

• heterotrophs use the nitrogen in the air that they breathe in
• heterotrophs get the nitrogen they need from the food they eat
• heterotrophs get the nitrogen they need from the water they drink
• heterotrophs can make their own nitrogen atoms

Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales

• Predation
• Parasitism
• Competition
• Mutualism
• Commensalism