lesson-food (POST 3)

Good morning! Welcome to another class of science. In our last two classes we learnt about autotrophs. 
Answer the following questions to recall what you have learnt-
1. Name the gas that plants require for photosynthesis.
2. In what form is food stored in the leaves of a plant.
3. Name the solution that is used to check the presence of starch in a leaf.
4. What imparts green colour to leaves?define heterotrophs

LEARNING OUTCOMES OF THIS CLASS
By the end of this class you will be able to-
.distinguish between autotrophic and heterotrophic nutrition.
.distinguish between herbivores,carnivores and omnivores
.list the modes of heterotrophic nutrition in plants
.give examples of saprophytic ,parasitic , insectivorous plants.
. explain the term symbiosis with an example 

Today you will learn about Heterotrophs.
HETEROTROPHS are organisms which cannot make their own food and depend on others for their food. All animals and humans are heterotrophs.
So, the difference between autotrophs and heterotrophs is -




Heterotrophs are of three types-
(i) HERBIVORES (plant eaters ) -These are animals which eat only plants and plant products. eg. cow,elephant
(ii) CARNIVORES ( meat eaters )- These are animals which eat meat or flesh of other animals. eg. frog,snake
(iii) OMNIVORES ( both plants and meat eaters )- These are animals that eat both plants and meat.
TRY THIS!
Given below are names of animals. Identify the herbivores,carnivores and omnivores -
 CAMEL    CROW    JACKAL   LIZARD  DOG  ANT  GRASSHOPPER  GOAT    HAWK   ANT  SPARROW

Plants have other modes of nutrition . Let us learn about them.
https://www.bing.com/videos/search?

NOW ANSWER THESE QUESTIONS ( orally ) :
1. Give an example of each of the following:
(i) Parasitic plant  (ii) Insectivorous plant  (iii) Symbiosis
2. Give scientific terms for the following :
(i)  The plants which depend wholly on the host plant,for their food.
(ii) The green plants which make their own food but depend on insects for nitrogenous food.
(iii) The two plants which live together as parts of the same plant and mutually help each other.
(iv) Relationship  in which two plants mutually benefit from each other.
HOTS!
1. Is it correct to call insectivorous plants as partial parasites?

HOMEWORK
1. Read pages 7-9 of the reader.
2. Do questions A ,B on page 12 in  your rough notebook and later in the reader.
3. Do questions A,B,C on page 13 in  your rough notebook and later in the reader.