Determine whether each structure is homologous or homoplasti

Determine whether each structure is homologous or homoplastic.

Long snout of egg-laying echidna and placental giant anteater

Cactus spine and tree leaf

Flippers of dolphins and fins of fish

Tailbone of human and tail of dogs

webbed feet of ducks and otters

true roots and root-like stems of plants

wings of bats and flippers of whales

Solution

Long snout of egg-laying echidna and placental giant anteater - Homologous

Cactus spine and tree leaf - Homoplastic

Flippers of dolphins and fins of fish - Homologous

Tailbone of human and tail of dogs - Homologous

webbed feet of ducks and otters - Homologous

true roots and root-like stems of plants - Homologous

wings of bats and flippers of whales – Homologous

Homologous structures arose from ancestrally, whereas Homoplastic structures arose independently