How do different species of larkspur illustrate the phenomena of heterochrony?
What will be an ideal response?
Heterochrony is changes in the timing of developmental events, which can cause the morphology of
closely related species to differ. Two species of larkspur illustrate paedomorphosis, which is the
development of reproductive capability in an organism with juvenile characteristics. A more recently
evolved species of larkspur develop floral parts slower than an ancestral species. As a result, the
ancestral species is pollinated by bees while the more recently evolved species is pollinated by
hummingbirds.
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What will be an ideal response?