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.
Write the names of the parts of a flower in sequence, from outside to inside.
Q 2.
Name the female part of a flower. Write names of its parts and draw a diagram.
Q 3.
List few plants found around your house.
Q 4.
Why do we see dew drops on leaves in the early morning?
Q 5.
What are trees? Give two examples.
Q 7.
Why does white flowers bloom at night?
Q 8.
What is the function of a stem in a plant?
Q 9.
Give two examples of trees.
Q 10.
Name the process by which leaves can prepare their food.
Q 11.
Name the part of plant which helps in holding the plant in the soil.
Q 12.
Give names of two plants which have tap root.
Q 13.
Name the prominent parts of a flower.
Q 16.
Name the various parts of pistil.
Q 18.
What are shrubs? Give two examples.
Q 19.
What are petals? Why are they generally coloured?
Q 21.
Name a plant that eats insect.
Q 22.
Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Q 23.
In which part of a flower you are likely to find the ovary?
Q 24.
What are the raw materials for photosynthesis?
Q 25.
What are sepals? What are their functions?
Q 26.
What are unisexual and bisexual flowers?
Q 27.
Leaves need oxygen and carbon-dioxide (for photosynthesis). How do they get these gases?
Q 28.
Explain that sunlight is essential for photosynthesis.
Q 29.
What are the major parts of plants?
Q 30.
How many types of leaf venation are there?
Q 31.
What is transpiration?
Q 32.
Does the stem prepare food for any plant?
Q 33.
What are herbs? Give two examples.
Q 34.
Why are petals colourful?
Q 35.
What do you mean by a complete and incomplete flower?
Q 36.
Name the part of the plant which produces its food. Name this process.
Q 37.
How many kinds of plants are there?
Q 39.
Where does the photosynthesis take place in plants?
Q 40.
Does the stem prepare food for any plant?
Q 42.
Pitcher plant has green leaves which can prepare food by photosynthesis then why does it eat insects?
Q 43.
Name a plant that has underground as well as aerial (above the ground) root system.
Q 44.
If a plant has fibrous root, what type of venation are its leaves likely to have?
Q 45.
If a plant has leaves with reticulate venation, what kind of roots will it have?
Q 46.
What is leaf venation?
Q 47.
Name various parts of stamen.
Q 48.
Classify plants and give an example of each.
Q 49.
Explain an activity to show that stem conducts water and other substances.
Q 50.
Explain the main functions of leaf.
