Class-10, NCERT, (CBSE), Heterotrophic mode of Nutrition

1. AKANKSHA
INTEGRATED B.SC. B.ED
LOVELY PROFESSIONAL UNIVERSITY, PHAGWARA

2.  Heterotroph is an organism that is unable to synthesize
its own food, and therefore, has to rely on other
sources, specifically plant and animal matter.

3. 1.
• Holozoic
2.
• Saprophytic
3.
• Parasitic

4.  Holozoic nutrition involves the ingestion and internal
processing of solid and liquid food in an organism. This
involves the steps of ingestion, digestion, absorption,
assimilation and excretion.
 Examples of animals that exhibit holozoic nutrition
include all vertebrates. Even some unicellular organisms
such as amoeba also exhibit holozoic nutrition

6.  Saprophytes (animals which follow saprophytic nutrition)
feed on dead and decayed organisms for energy. They
are an important part of the ecosystem as they help to
keep our environment clean and recycle nutrient back into
the ecosystem.
 Some examples of saprophytes are fungi and certain types
of bacteria. These are also responsible for the staling of
bread and other similar food products.

8.  Organisms that live in or on other organisms and
acquire food at the expense of its host are called
parasites.
 Most parasites are harmful to the hosts’ health; sometimes,
they even kill the host. Both animals and plants may serve
as a host.
 Examples of parasites are lice on a human head,
Cuscuta plant and tapeworms.

10.  Que-1. What do you understand by
heterotrophic mode of nutrition?
 Que-2. What are the different types of
heterotrophic nutrition?
 Que-3. What are the different types of
Heterotrophs?