Examine the figure:
$(a)$ Is this structure present in an animal cell or a plant cell?
$(b)$ Can these be passed on to the progeny? How?
$(c)$ Name the metabolic processes taking place in the regions marked $(A)$ and $(B)$.

(N/A) The figure shows a chloroplast,which is a characteristic organelle of plant cells. It contains thylakoids arranged in grana,which are the sites of photosynthesis.
$(b)$ Yes,chloroplasts can be passed on to the progeny. During cell division,chloroplasts are distributed into daughter cells through the cytoplasm. Furthermore,because they contain their own circular $DNA$,they are capable of semi-autonomous replication.
$(c)$ $(A)$ represents the stroma,which is the site of the dark reaction (Calvin cycle or biosynthetic phase) of photosynthesis.
$(B)$ represents the chloroplast $DNA$ (cp$DNA$),which carries genetic information necessary for the synthesis of some chloroplast proteins and is responsible for the semi-autonomous nature of the organelle.