A flea lives on a dog. It bites the dog to get nutrients. What kind of relationship is this?

• Mutualism
• Predation
• Parasitism
• Interspecific competition

A bee lands on a flower. The bee gets food from the nectar. The flower gets pollinated. What kind of relationship is this?

• Interspecific competition
• Intraspecific competition
• Mutualism
• Commensalism

A small bird called an ibis stands on a crocodile’s mouth.  The crocodile does not eat the ibis.  Instead, the bird eats the bacteria and algae off of its teeth. What kind of relationship is this?

• Commensalism
• Mutualism
• Predation
• Parasitism

A person eats meat that has tapeworm eggs in it.  The tapeworm grows and lives inside the person’s intestines.  The person eats but never gets any energy from the food because the tapeworm gets it.

• Parasitism
• Predation
• Interspecific competition
• Intraspecific competition

Two crows fight for living space in the same tree.

• Intraspecific competition
• Interspecific competition
• Predation
• Mutualism

A clownfish hides from predators in the stinging cells of a sea anemone.  The anemone does not hurt the clownfish.  The clownfish does not eat the anemone or help the anemone.

• Mutualism
• Commensalism
• Parasitism
• Predation

A lion hunts and kills an antelope.

• Intraspecific competition
• Interspecific competition
• Predation
• Parasitism

A fish called a remora gets a ride on the shark.  When the shark eats, the remora eats the pieces that float around.  The shark is not hurt or helped by the remora.

• Mutualism
• Commensalism
• Parasitism
• Predation

A rabbit and a grasshopper both eat the same kind of grass for food.

• Parasitism
• Predation
• Interspecific competition
• Intraspecific competition

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 A cowbird lays her eggs in the nest of another bird and flies away.  The cowbird does not have to feed or care for it’s young.  Instead the other bird must spend energy and food on the cowbird’s young.

• Intraspecific competition
• Interspecific competition
• Parasitism
• Commensalism