Page 13 - Science Class 07

5. Which of the following is a parasite?
(a) Fungi (b) Algae

(c) Round worm (d) Sundew
B. Fill in the blanks.
1. ____________ food habit can reduce the risk of chronic diseases.

2. The green pigments present in the leaves trap sunlight and convert light energy into
____________ energy.

3. During the process of photosynthesis, the leaves synthesise food in the form of
____________ and oxygen is released.

4. The word heterotroph consists of two words, ‘hetero’ means ____________ and ‘troph’
means ____________ .
5. ____________ obtain their nourishment for the host and may damage or even kill it in the
process.
C. Write True or False.
1. Plants do not need nutri on.
2. Only green plants can carry on the process of photosynthesis.

3. Glucose is converted into starch by plants.
4. Saprophytes feed on dead and decaying ma er of plants and animals.
5. Some plants supplement their nutri onal requirements by trapping
and diges ng insects.
D. Match the following columns.

Column I Column II
1. Chlorophyll a. Parasite
2. Glucose b. Saprophyte
3. Photo c. Symbio c organisms

4. Cuscuta d. Simple sugar
5. Mushroom e. Green pigment
6. Rhizobium f. Light

E. Very short answer ques ons.
1. What is nutri on?
2. What do you mean by food?
3. Write the components of food.

4. Write the name of four heterotrophs.
5. Write different types of heterotrophic nutri on.
6. Name any three parasi c nutri on.
F. Short answer ques ons.

1. Differen ate between autotrophic and heterotrophic nutri on.
2. Write the importance of photosynthesis.

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