INDIAN SCHOOL AL WADI AL KABIR

DEPARTMENT OF SCIENCE 2017-18

CLASS : VII TOPIC-NUTRITION IN PLANTS DATE:12.4.17 W.S.NO.1 NAME:

1. Name the following:

i) The pores through which leaves exchange gases.

ii) The process by which plants make food.

iii) The relationship between an alga and fungus in lichens.

iv) The parasitic plant with yellow, slender and tubular stem.

v)The nitrogen fixing bacteria.

II.Answer the following in one or two sentences.

i)Define the following terms:

a)Nutrition ( b) Parasites ( c) Saprophytes (d) Symbiosis (e) Photosynthesis.

ii) Why are green plants called autotrophs?

ii) Using iodine on leaves in a laboratory test, a change in color was observed on the leaves. Which color was shown on the leaves?

iii) Write the word equation showing photosynthesis?

iv) It is observed that farmers grow pea plants after a crop of paddy. Why?

v) Observe the figure given and answer the following questions-

a)What does the above experiment show?

b)Why doe the covered part not turn blue-black?

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vi) Give reasons-

a)Plants are said to be vital for maintaining life.

b) Cuscuta is considered to be a total parasite, while a mistletoe is a partial parasite.

vii) In an experiment to show that carbon dioxide is necessary for photosynthesis a leaf is placed in a conical flask with pottasium hydroxide in it. Why?

III. Answer the following in detail.

i)  Write a simple experiment to test the presence of starch in leaves?

(Hint: AIM,MATERIALS USED,METHOD,OBSERVATION,CONCLUSION)

ii)Observe the following figure and answer the questions given.

a) Name the organism shown.

b) Which type of nutrition is shown by the plant?

c) Why does it undergo this type of nutrition?

iii) Draw a neat labelled diagram showing the opened and closed stomata.

iv) The leaves of a plant is wiped with oil,and was observed that it dies after some days. Why?

iii) Explain how Rhizobium helps to replenish the soil?

HIGHER ORDER THINKING SKILLS:

1. Two different species of plants X and Y live together as a same plant Z. X is an autotroph,but plant Y supplies water and minerals to plant X ,which in turn makes food for Y.

a) What could be X,Y and Z

b) Name the relationship exhibitted by X and Y.

c) Give another example for this type of relationship.

* ( Prepare a picture file showing heterotropic plants)

Prepared by Rexy Ninan Page 2 of 2