D i believe, i could be wrong though
Answer:
Autoregulation
Explanation:
When the activities of a cell, tissue, organ, or system change automatically due to environmental variation, the homeostatic mechanism that operates is called autoregulation.
Autoregulation is a method of controlling the local blood circulation. It is characterized as an organ's inherent capacity to sustain a standard blood flow, given changes in the pressure of the perfusion.
The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
A genotype is determined by your genes and a phenotype is by your physical features
