2. An example of homologous organs is (a) Our arm and a dog’s fore-leg. (b) Our teeth and an elephant’s tusks. (c) Potato and runners of grass. (d) All of the above.
The arm of a human and the leg of a dog are homologous structures. They are different and have a different purpose, but they are similar and share common traits. Elephants' tusks are specialized incisors for digging food up and fighting.
