What do you mean by nutritive …

Nutritive apparatus refers to the strategy used by an organism to obtain nutrition from its food source. Example, a cow ingests  its food which gets digested and absorbed within the body.  
Some of the strategies used by heterotrophs are:

• Fungi feed upon dead and decaying plants and animals. They show saprotrophic mode of nutrition.
• Some organisms survives by growing on the body of another plant, deriving nutrients from this plant in the process. This mode of nutrition is known as parasitic mode of nutrition.
• There are certain organisms that live in association with other plants or animals and share their resources. In this kind of relationship, both the partners are benefitted by the relationship. and the mode of nutrition that is used can be called as symbiotic mode of nutrition.