"what event most likely produced the changes that occurred in the wild plant ancestor?
(1)mutations in wild mustard sex cells were passed on to offspring.
(2)humans did not like to eat wild mustard.
(3)competition for survival occurred in all ecosystems of the world.
(4)ancient herbivores overgrazed wild mustard."

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

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: