Assignment
Lesson 1 Grade - VII Nutrition in plants
Ques 1 : For each of the following questions, two statements are given: Assertion (A) and Reason (R). Choose the correct option:
Options:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.
(i) Assertion (A): Green plants are called autotrophs.
Reason (R): They depend on other organisms for food.
C
(ii) Assertion (A): Insectivorous plants are autotrophic in nature.
Reason (R): These plants trap insects only to supplement their nitrogen requirements.
a
(iii) Assertion (A): Photosynthesis takes place in all parts of a plant.
Reason (R): Chlorophyll is present in all plant parts.
D
(iv) Assertion (A): Saprophytic nutrition is seen in mushrooms.
Reason (R): Mushrooms absorb nutrients from decaying organic matter.
A
(v) Assertion (A): Oxygen is released during the process of photosynthesis.
Reason (R): Oxygen comes from the carbon dioxide absorbed by the plant.
C
Multiple choice question-answer
(i) Mushrooms are not autotrophs because they:
A. Have no roots
B. Grow in dark
C. Lack chlorophyll
D. Eat insects
(ii) If all green plants disappear from Earth, what will happen first?
A. Herbivores will increase
B. Oxygen levels will rise
C. Oxygen levels will drop
D. More rainfall will occur
(iii) Farmers add nitrogen-based fertilizers to the soil mainly to:
A. Increase seed size
B. Promote leaf growth
C. Enhance flower color
D. Repel insects
Ques 3. Draw a concept map to show the different types of nutrition in plants. Include:
Autotrophic nutrition
Heterotrophic nutrition (parasitic, saprophytic, insectivorous)
Examples of each
Ques 4. In your own words, explain the process of photosynthesis, including:
The equation of photosynthesis
The role of chlorophyll and sunlight
Why this process is vital for life on Earth
Ques 5. Read the description of a non-green plant like Cuscuta (dodder) or an insectivorous plant like pitcher plant.
Answer the following:
What kind of nutrition does it exhibit?
How is it adapted to obtain nutrients?
Why can't it photosynthesize?
Ques 6. Imagine you're an ecologist trying to restore a deforested area.
Explain:
Why planting green plants is essential
How their mode of nutrition will help in ecosystem recovery
Test for practice : https://forms.gle/WB5cjhhZCor9G8QF8
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