Answer
a) Analogous
b) Homologous
c) Analogous
d) Homologous
e) Homologous
f) Analogous
Work Step by Step
a) Dorsal fins help both propose and salmon to swim. For both animals, these dorsal fins evolved under the same environmental pressure.
b) Pectoral fins evolved from forearms of tetrapods. Fish and mammals are derived from tetrapods.
c) Ladybird beetles and robins are descendants of different lineages.
d) Both humans and monkeys descended from common ancestors.
e) Both plants are flowering plants and therefore share a common ancestor.
f) Though these two plants behave differently, they share a common descendant.
