Fact 1: Some arthropods have special excretory structures. Fact 2: Arthropods contain jointed appendages. Given the two facts above, some animals with jointed what have special excretory structures?
Options are:
(a). skin.
(b). appendages.
(c). they bend.
(d). eyes.
(e). muscles.
(f). sensory neurons.
(g). organ.
(h). insects.
(b).