Andrew gathered several different species of seed plants. Which three characteristics do all the plants most likely share?
have pollen and flowers; lack phloem
have pollen and rhizoids; lack xylem
have xylem and phloem; lack pollen
have xylem and phloem; lack rhizoids

It has to be b i hope this

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.