Question:
What are petals? Why are they generally coloured?
Answer:
The coloured big leaf-life structures present in flower are called petals. Petals are coloured so as to attract insects for pollination.
Getting to Know Plants
Q 1.
List few plants found around your house.
Q 2.
Name the female part of a flower. Write names of its parts and draw a diagram.
Q 3.
What are trees? Give two examples.
Q 4.
Write the names of the parts of a flower in sequence, from outside to inside.
Q 5.
Why do we see dew drops on leaves in the early morning?
Q 6.
Why does white flowers bloom at night?
Q 7.
What is the function of a stem in a plant?
Q 9.
Name the prominent parts of a flower.
Q 10.
What is transpiration?
Q 13.
Where does the photosynthesis take place in plants?
Q 14.
Name two flowers, each with joined and separates sepals.
Q 15.
Name the part of plant which helps in holding the plant in the soil.
Q 16.
What are sepals? What are their functions?
Q 17.
Why are petals colourful?
Q 18.
What is leaf venation?
Q 19.
Name the process by which leaves can prepare their food.
Q 20.
Name the various parts of pistil.
Q 21.
Classify plants and give an example of each.
Q 22.
What are shrubs? Give two examples.
Q 23.
Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Q 24.
Are all the plants same in size?
Q 26.
Give names of two plants which have tap root.
Q 27.
What are fibrous roots?
Q 29.
Name a plant that eats insect.
Q 30.
Name two plants that belong to herbs.
Q 31.
What are tap roots?
Q 32.
What are unisexual and bisexual flowers?
Q 33.
Name a plant that has underground as well as aerial (above the ground) root system.
Q 34.
Explain that sunlight is essential for photosynthesis.
Q 35.
Can you find a plant in your house or in your neighbourhood which has a long but a weak stem? Write its name. In which category would you classify it?
Q 36.
In which part of a flower you are likely to find the ovary?
Q 37.
Give two examples of shrubs.
Q 38.
Give two examples of trees.
Q 39.
Where does the photosynthesis take place in plants?
Q 40.
Leaves need oxygen and carbon-dioxide (for photosynthesis). How do they get these gases?
Q 41.
Explain the important functions of root.
Q 42.
What are the major parts of plants?
Q 43.
What are the raw materials for photosynthesis?
Q 44.
How many kinds of plants are there?
Q 45.
Does the stem prepare food for any plant?
Q 47.
How can one destarch the leaves of potted plant without plucking, them?
Q 48.
Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
(c) Roots conduct water to the leaves.
(d) The number of sepals and petals in a flower is always equal.
(e) If the sepals of a flower are joined together, its petals are also joined together,
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
Q 49.
If a plant has fibrous root, what type of venation are its leaves likely to have?
Q 50.
Name the part of the plant which produces its food. Name this process.
