Which statement best describes what happened? Secondary succession occurred, followed by several primary successions. Only secondary successions occurred. Primary succession occurred, followed by several secondary successions. Only primary successions occurred.

sadness is not good

explanation:

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?