Carnivorous plants like Nepenthes and Venus fly trap have nutritional adaptations. Which nutrient do they especially obtain and from where?

You have heard about serveral insectivorous plants that feed on insects. Nepenthes or the pitches plant is one such example. Which usually grows in shallow water or in marsh lands. What part of the plant os modified into a 'pitcher'? How does this modification help the plant for food even though it can photosynthesize like any other green plant?

Think of a plant which lacks chlorophyll. From where will it obtain nutrition? Give an example of such a type of plant.

Give the information about the following nutrients in plants as asked against each: Calcium:The chemical form in which it is absorbed from soil,part where used during cell division.