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Monday 27 July 2020

DAV BOOKS, STD-4, SCIENCE, CHAPTER 3 - FLOWERS, EXTRA QUESTIONS AND ANSWERS

1.      _______ is a colourful and beautiful part of a plant.

Ans: Flower

2.      Name some flowers which do not have attractive colours but have fragrance.

Ans: Champa, motia, chameli, are some flowers that do not have attractive colours but have fragrance.

3.      A flower develops from a ______.

Ans: Bud

4.      The bud of a plant is generally covered with ______.

Ans: green leaves

5.      What is the function of green leaves around the bud?

(OR) How do green leaves help a bud?

Ans: The green leaves protect the bud and help it to bloom into a flower.

6.      State two differences between a bud and a flower.

Ans:

Bud

Flower

It is the primary stage of the flower.

Flower is the part of the plant that usually grows into fruit.

Floral bud is the flower before it has opened. The petals remain folded together, covered by a green protective covering,

Flower develops from the bud. When bud opens and spreads its petals, it becomes flower.

Buds are generally green in colour.

It contains petals, which may have different attractive colours.

7.      What are the different shapes of the flowers?

Ans: Flowers may have bell shape, plate shape, bowl shape, brush shape etc.

8.      Flowers make ______.

Ans: Fruits

9.      Most of the fruits bear _____.

Ans: Seeds

10.  _______ grows into plants.

Ans: Seeds

11.  What do you understand by ‘seasonal flowers’? Give two examples of seasonal flowers.

Ans: Those flowers that grow only in a specific season, are called seasonal flowers. Chameli and Rose are seasonal flowers.

12.  Name some flowers that are seen in summer season.

Ans: Chameli, motia, sada-bahar, china rose and lily flowers bloom in summer season.

13.  Name some flowers that are seen in winter season.

Ans: Dahlia, rose and chrysanthemum are seen in winter season.

14.  Name the smallest flower in the world.

Ans: Watermeal, or Wolffia Globosa, is the smallest flower.

15.  Name the largest flower in the world.

Ans: Rafflesia Arnoldi is the largest flower in the world.

16.  State the uses of flowers.

Ans: i) Sweet smelling flowers like rose are used for making perfumes.

ii) Some flowers like sahjan, are used as vegetables.

iii) Some flowers like arnica, cloves, are used as medicines.

iv) Flowers are also used in preparing medicines.

v) Flowers, like marigold and zenia are used for making colours.

vi) Flowers are often used for decoration purposes.

17.  Name some flowers which have pleasant smell and are used for making perfumes.

Ans: Rose, jasmine, keora and lavender, have pleasant smell and are used for making perfumes.

18.  Name some flowers which are eaten as vegetables.

Ans: Kachnar, banana and Sahjan are eaten as vegetables.

19.  Name some flowers which are used in making medicines.

Ans: Clove and arnica are used in making medicines.

20.  State the uses of rose water.

Ans: i) Rose water is used as a medicine.

ii) It is also used for adding flavour to sweets and drinks.

21.  Name some flowers which are used for making colours.

Ans: Flowers like marigold and zenia are used for making colours.

22.  Name some places where we can use flowers for decoration purpose.

Ans: Flowers can be used for decoration purposes in birthday parties, marriage functions.

23.  Define a florist.

Ans: A florist is a person who arranges and sells cut flowers. (OR) The owner of a flowershop is called a florist.

24.  List the different types of materials used by the florist for making bouquets.

Ans: The different materials used by the florist for making bouquets are, different cut flowers, a knife, rubber bands, pins, paper and ribbon.

25.  Why do people buy bouquets?

Ans: People buy bouquets for gifting someone, for wishing someone, for making someone feel good.

    26.      Why should we eat fruits?

Ans: We should eat fruits because they give nutrition to our body.

27.      What is the function of fruits?

Ans: Fruits store seeds and food in them.

28.      Name some fruits which have only one seed.

Ans: Mango, peach, and plum have only one seed.

29.      Name some fruits which have many seeds.

Ans: Lemon,papaya, orange and watermelon have many seeds.

30.      Name some fruits which do not have seeds.

Ans: Some varieties of bananas, grapes and papayas do not have seeds in their fruits.

31.      What is the function of seeds?

Ans: Seeds produce new plants.

32.      Banana has no seeds. Then, how does it reproduce?

Ans: Banana reproduces through its stem.

33.       What do you mean by seasonal fruits? Give two examples of seasonal fruits.

Ans: Those fruits that grow only in a specific season, are called seasonal fruits. Muskmelon and grapes are seasonal fruits.

34.      Name some fruits grown in summer.

Ans: Muskmelon, watermelon, mango, litchi, jamun and falsa are some fruits that are grown in summer.

35.  Name some fruits that we get in winter.

Ans: We get grapes, apples, oranges and Indian gooseberry (amla) in winter.

36.  Name any three dry fruits. Write two ways in which they are used in our daily life.

Ans: i) Cashewnuts, almonds and walnuts are some dry fruits.

ii) They are often eaten as such.

iii) They are also used in preparing various dishes.

37.  Name some fruits which are used as vegetables.

Ans: Bitter gourd (karela), gourd, Jack fruit (kathal), brinjal, okra (bhindi) and tomato are used as vegetables.

38.  Name the largest fruit in the world.

Ans: Jackfruit is the largest fruit in the world.

39.  Write two uses of fruits.

Ans: i) Some fruits like brinjal and tomato are used as vegetables.

ii) Some fruits, like mango and lemon are used for preparing pickles, chutneys.

40.  List the food preparations that can be made by using mango fruit.

Ans: Mango fruit can be used to make,

i) pickles

ii) chutney

iii) marmalades etc. 

 

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