The phylogenetic tree on the right depicts the evolutionary relationships between charophytes and plants. It is thought that the first true plants were derived from a charophyte. ... Chlorophyll a is common to other photosynthetic organisms, but chlorophyll b is shared only by green algae and plants.
This is called activation energy
Recessive traits thats what they are called
I believe the term for two similar chromosomes would be homologous chromosomes.
