Geting to Know Plants: science class six
NCERT Exercise Question and Answer
Question (1) Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
Answer: Root absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
Answer: Stems hold the plant upright.
(c) Roots conduct water to the leaves.
Answer: Stems conduct water to the leaves.
(d) The number of petals and sepals in a flower is always equal.
Answer: The number of petals and sepals in a flower can be equal or different.
(e) If the sepals of a flower are joined together, its petals are also joined together.
Answer: If the sepals of a flower are joined together, its petals may or may not be joined together.
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
Answer: If the petals of a flower are joined together, then the pistil may or may not be joined to the petal.
Question (2) Draw (a) a leaf, (b) a taproot and (c ) a flower, you have studied for table 7.3.
Answer:
Question (3) Can you find a plant in your house or in your neighborhood, which has a long but a weak stem? Write its name, in which category would you classify it?
Answer: In my house my mother planting a cucumber plant which have long and weak stem. The plant is spread on ground. It is an example of creepers.
Question (4) What is the function of a stem in a plant?
Answer: The main functions of stem are
(a) The stem carries water and minerals from the roots to different parts of the plants.
(b) The stem carries the food made by the leaves to the other part of the plant.
(c) The stem supports branches, leaves, flowers and fruits.
Question (5) Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Answer: China rose and coriander
Question (6) If a plant has fibrous root, what type of venation do its leaves likely to have?
Answer: If a plant has fibrous root their leaves have parallel venation.
Question (7) If a plant has leaves with reticulate venation, what kind of roots will it have?
Answer: If a plant has leaves with reticulate venation they have tap root.
Question (8) Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper?
Answer: No
Question (9) Write the names of the parts of a flower.
Answer: Sepals, Petals, stamens, and pistals are the name of parts of a flower.
Sepals: The outermost green–leafy structures in a flower are called sepals. Sepals protect the flower at the bud stage
Petals: Petals are sweet scented and colourful part of a flower. Petal makes a flower beautiful.
Stamen: Stamen is the male reproductive part of a flower.
Pistil: Pistil is the female reproductive part of a flower.
Question (10) Which of the following plants have you seen? Of those you have seen, which one have flowers?
Grass, maize, wheat, chilli, tomato, tulsi, pepal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut.
Answer: Plant with flowers from the given list are maize, wheat, chilli, tomato, mango, jamun, guava, pomegranate, papaya, banana and lemon.
Question (11) Name the part of the plant which produces its food. Name this process.
Answer: Leaves of green plants produce food. The food making process by plant is called photosynthesis.
Alternate Answer
Answer: Leaves produce food for the plants. Because of this leaf is called the food factory of a plant. Green leaf make food from carbon dioxide and water in the presence of sunlight and chlorophyll absorbs sunlight and changes carbon dioxide and water into glucose and oxygen.
This process of food making by plant is called photosynthesis.
Question (12) In which part of a flower, you are likely to find the ovary?
Answer: Ovary is found in the pistil of a flower.
Question (13) Name two flowers, each with joined and separated sepals.
Answer: China rose has jointed sepals and Rose has separated sepals.
Extra Questions and Answer based on the chapter of Getting to Know Plants:
(A) Answer the following questions.
Question (1) What is root system?
Answer: The part which grows below the ground is called root system of a plant.
Question (2) What is shoot system?
Answer: The part which is found above the soil is called shoot system of a plant.
Question (3) What is fibrous root?
Answer: Roots in which several roots grow out at the same time from the base of the stem is called fibrous root.
Question (4) What is Tap root?
Answer: Root of plant that grows downwards in the soil as a single root is called tap root.
Question (5) What do you mean by tendrils.
Answer: Spring like outgrowths, from the stem, or leaves, to support the plants of creepers and climbers is called tendrils.
Question (6) What is stomata?
Answer: Tiny pores found on the surface of leaves are called stomata. Stomata helps in exchange of gases.
Question (7) What is photosynthesis?
Answer: The food making process by green plant is called Photosynthesis. A green plant makes food in the presence of sunlight, chlorophyll, carbon dioxide and water.
Question (8) Which is the male part of a flower?
Answer: Stamen is the male part of a flower.
Question (9) Which is the female part of a flower?
Answer: Pistil is the female part of a flower. Pistil is also known as carpel.
Question (10) What is the function of modified stem?
Answer: Modified stem stores food and provide additional support to the plant.
(B) Write True or False for the following statement.
Question (1) All plants possess the tap root.
Answer: False
Correct statement: All plants do not possess tap root. Some plant have tap root while some have fibrous root.
Question (2) The wheat and maize plants have a fibrous root.
Answer: True.
Question (3) Cactus plants photosynthesis through their stem.
Answer: True
Question (4) Leaves manufacture food for plant.
Answer: True
Question (5) Stigma and ovary have no role in reproduction.
Answer: False
Correct statement: It is stigma and ovary of a plant which are reproductive organs of a flower.
Question (6) Seeds store food for the future plant.
Answer: True
Question (7) Stem manufactures food for plants.
Answer: False
Correct statement: Leaves manufacture food for plants.
Question (8) The pistil is the female part of a flower.
Answer: True
Question (9) Fruit protects the seeds and helps in their dispersal.
Answer: True
Question (10) Leaf is the green coloured, thin, boad and flat part of a plant.
Answer: True.
(3) Fill in the blanks
(1)Maize, wheat and rice are examples of_________ roots.
Answer: Maize, wheat and rice are examples of fibrous roots.
(2) Ginger and potato are two examples of modified _________.
Answer: Ginger and potato are two examples of modified stem.
(3) Prop root in the tree of Banyan is an example of _________ roots.
Answer: Prop root in the tree of Banyan is an example of modified root .
(4) The main function of _________ in green plants is to prepare food for the plant.
Answer: The main function of leaves in green plants is to prepare food for the plant.
(5) The leaves of cacti are modified into _______.
Answer: The leaves of cacti are modified into spines
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