1) Barnacles attach themselves to migrating whales so that they can ride along to new feeding grounds. The whale is not helped or harmed by the barnacles. a) Mutualism b) Predation c) Commensalism d) Parasitism 2) A symbiotic relationship between two species in which both organisms benefit a) Mutualism b) Predation c) Commensalism d) Parasitism 3) Fleas live on the skin of dogs and obtain nutrients from the dogs’ blood. a) Mutualism b) Predation c) Commensalism d) Parasitism 4) The honeyguide bird leads honey badgers to bee hives. The badgers then break open the hives and eat the honey inside. Once the badger is finished, the honey guide birds feed on the leftover beeswax. a) Mutualism b) Predation c) Commensalism d) Parasitism 5) A plant is pollinated by a species of moth. The moths lay their eggs in the flowers of the plant for protection and food. a) Mutualism b) Predation c) Commensalism d) Parasitism 6) A tapeworm lives inside the digestive tracts of a sheep and feeds on the nutrients of the food the sheep eats. a) Mutualism b) Predation c) Commensalism d) Parasitism 7) A symbiotic relationship between two species in which one benefits and the other is unaffected a) Mutualism b) Predation c) Commensalism d) Parasitism 8) A symbiotic relationship between two species in which one benefits and the other is harmed a) Mutualism b) Parasitism c) Commensalism 9) A cuckoo bird lays its eggs in a warbler bird's nest. Once hatched, the cuckoo chicks displace the warbler chicks, tricking the parent warbler into caring for them over their own young. a) Commensalism b) Predation c) Mutualism d) Parasitism 10) Nitrogen-fixing bacteria obtain nutrients from their host plants and use the nutrients to supply nitrogen to the plants. a) Commensalism b) Predation c) Mutualism d) Parasitism 11) A hawk attacks and kills a mole, consuming it for its meal. a) Commensalism b) Predation c) Mutualism d) Parasitism 12) A deer grazes on tall grasses in the forest. a) Competition b) Herbivory (Predation) c) Mutualism d) Parasitism 13) A deer grazes on tall grasses in the forest. a) Competition b) Herbivory (Predation) c) Mutualism d) Parasitism 14) Green algae grow on the backs of spider crabs living in shallow water, camouflaging the spider crabs while the crabs protect the algae from predators. a) Competition b) Herbivory (Predation) c) Mutualism d) Parasitism 15) Two plants growing beside one another try to access limited available sunlight. a) Competition b) Herbivory (Predation) c) Mutualism d) Parasitism

Ecological Relationships

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