How would I fill out this dichotomous key??? (5th time asking, please answer)

Statement 1a: Needle leaves, Pine(Name)

Statement 1b: Non-needle leaves, 2(Number)

Statement 2a: smooth edge, Magnolia(Name)

Statement 2b: jagged edge, Elm(Name)

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

the tricuspid valve is present between right atrium and right ventricle