Which of the following best describes the ploidy level of a fertilized embryo sac? a) all cells are diploid. b) all cells are triploid. c) all cells are polyploid. d) the ploidy level varies among species. e) there are haploid, diploid, and triploid cells.

e. There are haploid, diploid, and triploid cells.

the cytokine-activated janus kinase (jak)-signal transducer and activator of transcription (stat) pathway has an important role in the control of immune responses. dysregulation of jak-stat signaling is associated with various immune disorders.