Peridotite, which is composed almost entirely of dark silicate materials and is believed to make up much of earths upper mantle, has a composition that is

I believe the answer is Ultramafic

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.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.