Question

18 (a) Leaves of a healthy potted plant were coated with vasetine to block the stomata
Will this plant remain healthy for long? State three reasons for your answer
(b) State any two differences between autotrophic nutrition and heterotrophic marion
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Answer 1

a) answer

b)The differences between autotrophs and heterotrophs are given below:

Autotrophs Heterotrophs

Type of Organisms:

•Usually members of the plant kingdom and certain unicellular organisms like cyanobacteria •All members of the animal kingdom

Mode of Nutrition:

•Autotrophs are producers which prepare their own food.

•Heterotrophs are the consumers who depend on other sources for their food.

Classified into:

•These can be classified as photoautotrophs and chemoautotrophs.

• These can be classified as photoheterotrophs and chemoheterotrophs.

Presence of chloroplasts:

•The chloroplast helps in preparing food.

•They do not contain chloroplast, so cannot prepare food.

Energy is obtained from:

•They obtain energy from inorganic sources by converting light energy into chemical energy. •They obtain energy directly or indirectly from other organisms.

Energy Storage:

•Autotrophs can store light energy and chemical energy.

•Heterotrophs cannot store energy.

In Food Chain:

•They are placed at the primary level in the food chain.

• These are placed in the secondary or tertiary level in the food chain.

Locomotion:

•They cannot move from their place.

•Can move from one place to another in search of food and shelter.

Examples:

•Green plants, algae and a few photosynthetic bacteria are examples of autotrophs.

•Cows, buffaloes, tigers, horses, humans are examples of heterotrophs.

first dot of every topic is the point of autotroph and second dot of every topic is the point of heterotroph

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