Describe some of the ways that scientists are studying plant root behavior. what have they found?

In turn, plants have evolved complex strategies to forage for soil resources; root growth and root system development correspond to the allocation of assimilates to individual root apices capable of independent, yet coordinated at the plant level, morphological and physiological responses to their immediate environment. they found that some nutrients had comparable if not larger plant available pools in deeper soil layers These results, in addition to data on strontium (Sr) uptake from deep soil horizons, suggest that deep soils in (semi-) arid regions may be more significant nutrient sources than commonly believed

C- a hypothesis or d- an observation