What is Heterotrophic Nutrition in Plants Class 7: Explained Simply
By ConceptScroll Team · Published on 19 June 2026 · 3 min read
In Class 7 Science, heterotrophic nutrition in plants means plants that cannot make their own food and depend on other sources. This simple definition helps you understand different plant nutrition types in the NCERT chapter 'Nutrition in Plants'.
Definition of Heterotrophic Nutrition in Plants
Heterotrophic nutrition in plants refers to the mode of nutrition where plants cannot prepare their own food through photosynthesis. Instead, they depend on other organisms or organic substances for their nutrition. Unlike autotrophic plants, which use sunlight to make food, heterotrophic plants obtain nutrients by absorbing them from other plants, dead matter, or animals.
In Class 7 NCERT Science, understanding this concept is crucial as it explains the diversity in plant nutrition beyond the common photosynthesis process.
Types of Heterotrophic Nutrition in Plants
Heterotrophic nutrition in plants can be divided into three main types:
- Parasitic Nutrition: These plants depend on other living plants for food by attaching to their roots or stems. Example: Cuscuta (Amarbel).
- Saprophytic Nutrition: These plants feed on dead and decaying organic matter. Example: Fungi and Monotropa.
- Insectivorous Nutrition: These plants trap and digest insects to obtain nutrients, especially nitrogen. Example: Nepenthes (Pitcher plant), Drosera (Sundew).
Each type shows a unique way plants survive without photosynthesis.
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How Heterotrophic Nutrition Differs from Autotrophic Nutrition
The key differences between heterotrophic and autotrophic nutrition are:
| Feature | Autotrophic Nutrition | Heterotrophic Nutrition |
|---|---|---|
| Food Source | Makes own food using sunlight (photosynthesis) | Depends on other organisms or organic matter |
| Example Plants | Green plants like Spinach, Peepal | Cuscuta, Fungi, Nepenthes |
| Energy Source | Sunlight | Organic substances from other plants or animals |
| Chlorophyll Presence | Present | Often absent or reduced |
This comparison helps Class 7 students clearly differentiate the two nutrition types.
Examples of Heterotrophic Plants and Their Nutrition Modes
Here are some common heterotrophic plants studied in Class 7 NCERT:
- Cuscuta (Amarbel): A parasitic plant that coils around host plants and absorbs nutrients.
- Fungi: Saprophytic organisms that decompose dead matter.
- Nepenthes (Pitcher Plant): An insectivorous plant that traps insects in its pitcher-shaped leaves.
Worked Example:
Question: Why is Cuscuta called a parasitic plant?
Answer: Because Cuscuta depends on a host plant for food by attaching to its stem and absorbing nutrients, it cannot prepare its own food, making it parasitic.
Understanding these examples helps in remembering heterotrophic nutrition types.
Importance of Studying Heterotrophic Nutrition in Class 7 Science
Studying heterotrophic nutrition in plants is important because:
- It shows the diversity of plant life beyond green plants.
- Helps understand ecological relationships like parasitism and decomposition.
- Explains how some plants survive in nutrient-poor environments.
- Prepares students for CBSE exams with clear concepts from the NCERT textbook.
Focusing on this topic improves your grasp of the 'Nutrition in Plants' chapter and helps answer exam questions confidently.
Frequently asked questions
What is heterotrophic nutrition in plants?
It is when plants cannot make their own food and depend on other organisms for nutrition.
Can all plants perform heterotrophic nutrition?
No, only certain plants like parasites, saprophytes, and insectivorous plants are heterotrophic.
Give an example of a parasitic plant.
Cuscuta, also known as Amarbel, is a common parasitic plant.
How do insectivorous plants get their food?
They trap and digest insects to obtain nutrients, especially nitrogen.
Why is heterotrophic nutrition important for some plants?
It helps plants survive in environments where photosynthesis is not possible or insufficient.
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