Answer:
The unwanted plants that grow in the fields with the main crops or in their surroundings are called weeds. Weeds are the plants which are not grown by the farmers. For example, grass.
Getting to Know Plants
Q 1.
List few plants found around your house.
Q 2.
Write the names of the parts of a flower in sequence, from outside to inside.
Q 3.
What are trees? Give two examples.
Q 4.
Why do we see dew drops on leaves in the early morning?
Q 5.
Name the female part of a flower. Write names of its parts and draw a diagram.
Q 6.
What is the function of a stem in a plant?
Q 8.
Why does white flowers bloom at night?
Q 9.
Name various parts of stamen.
Q 10.
What is transpiration?
Q 11.
Where does the photosynthesis take place in plants?
Q 12.
Name the part of plant which helps in holding the plant in the soil.
Q 13.
Name the prominent parts of a flower.
Q 14.
What are sepals? What are their functions?
Q 15.
Classify plants and give an example of each.
Q 17.
Where does the photosynthesis take place in plants?
Q 18.
What are tap roots?
Q 19.
Name the various parts of pistil.
Q 21.
Why are petals colourful?
Q 22.
Name two flowers, each with joined and separates sepals.
Q 24.
What are unisexual and bisexual flowers?
Q 25.
Leaves need oxygen and carbon-dioxide (for photosynthesis). How do they get these gases?
Q 26.
Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Q 27.
In which part of a flower you are likely to find the ovary?
Q 28.
Give two examples of shrubs.
Q 29.
What is leaf venation?
Q 30.
Name the process by which leaves can prepare their food.
Q 31.
Name the types of roots shown in the Fig. 7.7.
Q 32.
Does the stem prepare food for any plant?
Q 33.
Name a plant that eats insect.
Q 34.
Pitcher plant has green leaves which can prepare food by photosynthesis then why does it eat insects?
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.
How many kinds of plants are there?
Q 37.
Is it possible for you to recognise the leaves without seeing them? How?
Q 38.
Give names of two plants which have tap root.
Q 39.
What are fibrous roots?
Q 41.
What do you mean by leaf venation? Explain various types of leaf venation with example.
Q 42.
Are all the plants same in size?
Q 45.
What are petals? Why are they generally coloured?
Q 46.
What are herbs? Give two examples.
Q 47.
What are shrubs? Give two examples.
Q 48.
Name a plant that has underground as well as aerial (above the ground) root system.
Q 49.
How can one destarch the leaves of potted plant without plucking, them?
Q 50.
Explain the important functions of root.
