A DID system can be used for fax and voice mail as well as for live voice connections. Compared to regular PBX service, DID saves the cost of a switchboard operator, calls go through faster, and callers feel they are calling a person rather than a company.
Key Concepts: In dicotyledonous leaves there are two types of mesophyll cells, palisade mesophyll and spongy mesophyll. Palisade mesophyll cells form a layer beneath the upper epidermis whereas spongy mesophyll cells are internal to the lower epidermis.
Rating Newest Oldest. Best Answer: The mesophyll is the leaf tissue where most of the chloroplasts are found and photosynthesis takes place. The mesophyll is differentiated into the palaside mesophyll and teh spongy mesophyll.The palaside mesophyll is made up of one or more layers of narrow, elongated parenchyma cells; these cells have a higher concentration of chloroplasts, and therefore these are the cells in which most of the photosynthesis takes place.hotosynthesis takes place in chloroplasts...which contain chlorophyll pigment,which is necessary for photosynthesis.misophyll cells of the leaf contain maximum number of chloroplasts...it is the main site of photosynthesis.