The only living thing that makes its own food is the plant. So the first step in a food chain is always a plant that makes its own food by sun. :)))
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The evidence supporting the idea that modern birds and reptiles share a common ancestor is that feathers are a derived characteristic that first evolved in reptiles. Feathers represent an evolutionary derived trait.
In evolutionary biology, an autapomorphy is a distinctive phenotypic trait referred to as a derived trait, which is unique to a particular group/taxon.
The derived traits are phenotypic features that arise during the evolution of a particular taxonomic group.
These traits (derived traits) differ from the phenotypic trait of the ancestor of the group.
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Usually to study genetics mendel used pea plants because of the easy traits associated
The circle of life best illustrates natural selection
