Phloem cells are __________. a. dead at maturity and are used to transport water from the roots to the rest of the plant b. dead
at maturity and are used to transport sugars throughout the plant c. alive at maturity and are used to transport water from the roots to the rest of the plant d. alive at maturity and are used to transport sugars throughout the plant
Answer: b. dead at maturity and are used to transport sugars throughout the plant.
Phloem cells are the cells which transport the product of photosynthesis that is food from the leaves to other parts of the plant. A typical phloem consist of sieve cells, phloem fibers, and phloem parenchyma. Sieve cells are elongated and they have minute pores which facilitates the transport of food through these pores. The phloem fibers provides mechanical support to the phloem. Phloem parenchyma cells are responsible for the storage of food. The process by which phloem transport food is called as translocation. Sieve cells are the main type of cells helps in food translocation, in maturity these cells looses their nucleus and ribosomes therefore, they die in maturity.
In a pinhole camera, light passes through the pinhole to project an upside-down image onto the back of the box, and in the human eye, light passes through the lens to project an upside-down image on the back of the retina
