AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Cuscuta, ticks, lice, leeches and tape-worms use the parasitic nutritive strategy, deriving nutrition from plants or animals without killing them.
Source: Chapter 5, Section 5.2.2 Heterotrophic Nutrition
The keyword the examiner expects is "parasitic". The textbook explicitly states this word for these exact organisms. Writing "parasitism" is also acceptable. Do not describe it at length — one line is sufficient for 1 mark.