Question

which of the following is an example of commensalism? *
a tick feeding on a dog
an oxpecker bird eating ticks off a buffalo
barnacles attaching to a whale
a lion hunting a zebra

in parasitism, the parasite: *
provides food to the host
harms the host to benefit itself
benefits both organisms equally
lives independently of the host

Explanation:

Commensalism is a symbiotic relationship where one organism benefits and the other is neither helped nor harmed. Barnacles attaching to a whale benefit from transportation and access to food - rich waters, while the whale is largely unaffected. In parasitism, the parasite harms the host to benefit itself. A tick feeding on a dog is parasitism as the dog is harmed. An oxpecker bird eating ticks off a buffalo is mutualism as both benefit. A lion hunting a zebra is predation.

Answer:

1. C. Barnacles attaching to a whale
2. B. Harms the host to benefit itself