Fill in The Blanks
1. Short Plants is a herb.
2. The cap-like structure that protects te tip of the root is called root cap
3. The plant part that bears flowers, fruits and leaves is called shoot-system.
4. The main vein of the lea is called midrib.
5. The stalk of flower is called pedicel.
6. The arrangement of veins in a leaf is called venation.
7. A flower with male as well as female reproductive organs is called hermaphrodite.
8. Loss of water from the leaves in the form of water vapour is called transpiration.
B. Multiple choice questions
1. The plant with thick, brown, woody stem is
ans. tree
2. Which of the following has a tap root?
ans. turnip
3. The point on the stem where new leves arise is called a
ans. node
4. The leaves are green due to the presence of
ans. chlorophyll
5. The male reproductive organs of a flower is
ans. stamen
6. A flower without a stalk is called
ans. sessile flower
C. Very short Answer
1. Name the main root of tap root system primary root.
2. The space between two nodes internode
3. Name one shrub rose
4. Weak-stemmed plants that need support to climb climbers
5. Name one plant that has leaves with parallel venation maize.
6. Name one plant that has leaves with reticulate venation mango
D. Short answer questions
1. In which part of the plant will you find the following
ans. a. node:-stem
b. lamina-leaf
c. ovary- pistil
d. petiole- leaf
e. filament-stamens
2. Give one example of each of the following
ans.
a. Fibrous rots- maize
b. climber-money plant
c. creeper-pumpkin
d. complete-flower-glmohar
3. Differentiate between
a tap root system and fibrous root system
ans. Tap root system:- When a plant has one big root with many branches at its sides, it is known as tap root system, e.g. bean, gram, mango, radish, carrot etc.
Fibrous root system:- When a bunch of slender fiber like roots arise from the base of the stem, it is called fibrous root system. e.g. wheat, maize, paddy, grass
b. Stamen and pistil
ans.
Stamen:-The male reproductive part of a flower is called stamen
Pistil:- The female reproductive part of a flower is called pistil.
4. What is transpiration?
ans. The loss of excess of water from the plant in the form of water vapour through stomata is called transpiration.
5. What is venation? Name two types of venation with one example of each.
ans. The arrangement of veins on the leaf is called venation. Reticulate venation in mango and parallel venation in wheat are the example.
6. Define pollination.
ans. The transfer of pollen grains from anther to stigma of a flower is called pollination.
E. Long answer questions.
1. List the important functions of root and stem.
Ans. Roots do the following functions
(a) Fixation:- Roots help in fixing the plant firmly to the soil.
(b) Absorption: Roots absorb water and mineral salts from the soil which are necessary for the growth of the plant.
(c) Conduction: Roots also conduct water and mineral salkts up to the leaves through the stem where the food is actually made.
(d) Storage: Roots of some plants like beetroot, carrot radish, turnip ans sweet potato store extra food in them. We eat them as vegetables.
(e) Support: Some roots provide extra support to the plant. These roots are of two types stilt and prop roots
(f) Climbing: In some plants like betel, money plant, etc roots arise from the nodes and help the plant to stick and climb up the wall. They are called climbing roots.
2. Describe the structure of of a flower with the help of a well-labelled diagram.
ans. Flower has slender stalk called the pedicel by which it is attached to the stem. A flower without a pedicel is said to be sessile. The pedicel is slightly enlarged at its tip ot form a cushion-like part called the thalamus or receptacle.
From the thalamus arise the various parts of the flower in four sets of whorls one within the other.
There are floral parts as under:
Sepal: The outer most part of a flower.
Petals: Showy parts of a flower. They protect stamens and ovary.
Stamens: It is the male part of flower.
Pistil: It it the female part of a flower.
When all the parts present in a flower, they are called complete flowers and in some flowers, one or more part is missing they are called incomplete flowers.
3. What is the use of stomata in plants? Where are they located?
ans. The leaf surface is covered with minute pores. They are called stomata Exchange of gases takes places through stomata. During this process oxygen is taken in and carbon dioxide is given out. This process is called respiration.
They are located in leaves of plants.
4. Discuss the functions of a leaf in detail.
ans. Photosynthesis: The leaves of the plant prepare food for the plant. Process by which leaves of plants make food in the presence of sunlight is called photosynthesis. Photosynthesis is unique to green plants. It supplies food to the plants and oxygen to other forms of life.
Respiration: Exchange of gases takes place through the stomata of the leaf. During this process oxygen is taken in and carbon dioxide is given out. It is called respiration.
Transpiration: The excess of water in the plant is sent out in the form of water in the plant is sent out in the form of water vapour through the stomata.
Vegetative Propagation: in bryophyllum and begonia plants, leaf-buds develop on te margin of the leaf. The buds fall on the ground and develop into new plants.
Storage: Some leaves do the function of storage of food. Leaves of cabbage became thick and fleshy when they store food and water. We eat leaves of some plants as vegetables due to their food value,
Have look at the following chapters too.
Body Movement Class VI Science
Fibre to Fabric Class VI Science
Changes Around us Class VI Science
Separation of Substances Class VI Science
Sorting Materials into groups class VI Science
Lights, Shadows and Reflections Science Class VI
Components of Food Class VI Science
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