1. Organisms which prepare food for themselves using simple naturally available raw
materials are referred to as
(a) heterotrophs
(b) autotrophs
(c) parasites
(d) saprophytes
2. In the absence of which of the following will photosynthesis not occur in leaves?
(a) Guard cells
(b) Chlorophyll
(c) Vacuole
3. Which of these is/are necessary for photosynthesis to takes place-?
a- Carbon dioxide b-Chlorophyll c-Water d-All of these
Q2.Fill in the blanks:
1.Green plants are called __________ since they synthesise their own food.
2. A spherical structure located at the centre of the cell called a ________ .
3. During photosynthesis plants take in _________ and release_________.
4. During photosynthesis__________energy is captured by the leaves and stored as food.
5. Proteins contain…………….
6. Farmers enrich the soil by adding ……………….. and…………………….
7. In most of green plants, photosynthesis takes place in the…………………….
8.Plants are unable to use atmospheric…………………
9.Green patches in stagnant water are aquatic………………
10. During photosynthesis, ……………… energy is captured by the leaves and stored as food.
Q3. Short answer Questions:
1. Distinguish between autotrophs and hetrotrophs in two
points.
2.What are nutrients? Give some examples.
3. “Food is essential for all the living organisms”. Justify the
statement by giving suitable explanation.
4. List the raw materials needed by a plant to produce food.
5. Give reason:
(i)Leaves are also called the food factories of a plant.
(ii) Sun is said to be the ultimate source of energy.
Q4. Photosynthesis requires chlorophyll, and a few other
raw materials. Add the missing raw materials to the list
given below: Water, minerals, _____________, ______________.
Q5. Sunlight, chlorophyll, carbon dioxide, water and
minerals are raw materials essential for photosynthesis.
Do you know where they are available? Fill in the blanks
with the appropriate raw materials.
(a) Available in the plant : _______________
(b) Available in the soil : ___________, _____________
(c) Available in the air : _______________
(d) Available during day : _______________
Q6. In desert plants, leaves are reduced to spines in
order to reduce loss of water. How do such plants
prepare food?
Q7. In the absence of photosynthesis, life would be
impossible on earth. Justify in two points.
Q 8. Draw well labeled diagrams of:
(i) A section of a leaf (ii)Stomata
Answers
Answered by
2
Answer:
1. (b) autotrophs
2.(b) Chlorophyll.
3.All of these
Q2.
1.autotrophs
2.nucleus
3.i)carbondioxide
ii) Oxygen
4. light
5. amino acids
6.manure and fertilizer
7. chloroplast
8. nitrogen
9. plants or organism . this line refers to organism algae.
10. light
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