Answer:
organisms that have more favorable traits tend to leave more offspring ... improved fitness of certain individuals in the population that allows for survival and reproduction. ... Based on H-W conditions, five major causes of evolution: ... factors that prevent organisms of two species from producing vigorous, fertile offspring
Explanation:
The skull size of each species!
It's the size of the skull specifically the jaw bones, that can help determine relationships of two hominid species.
Hope this helps!
The first species to colonize a barren area is a Pioneer Species
Like all other heterotrophs, it eats and goes through cellular respiration.
