The right answer is Lichen.
In ecology, a pioneer species is one of the first forms of life that colonize or recolonize a given ecological area.
Lichens are composite organisms resulting from a symbiosis between at least one heterotrophic fungus called mycobionte, representing 90% of all, and microscopic cells with chlorophyll (green algae or cyanobacteria autotrophic for carbon) called "photobionts" .
Explanation:
it is (A sexual ) as the sexual reproduction involve the fusion of gametes there is no fusion of gametes which requires two plant , there is only one which produces the other one ( I hope this might help you )
Answer:
They change their color so they wouln't be spotted by predators. Its like a self defence meckanisum ( i dont knwo how to spell) so they wouldn't get caught.
Explanation:
hope this helped