Question:
What do you mean by leaf venation? Explain various types of leaf venation with example.
Answer:
Leaf venation: The design made by veins in a leaf is called leaf venation. There are the following two types of leaf venation:
(i) Reticulate venation: If the design of veins makes a net-like structure on both the sides of midrib then it is called reticulate venation. For example, mango leaf, gram leaf.
(ii) Parallel venation: If the veins are parallel to each other or to midrib then such type of venation is called parallel venation. For example, wheat leaf, barley leaf.
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.
Write the names of the parts of a flower in sequence, from outside to inside.
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.
Name the prominent parts of a flower.
Q 9.
What is the function of a stem in a plant?
Q 10.
What are sepals? What are their functions?
Q 11.
What is transpiration?
Q 14.
Name the process by which leaves can prepare their food.
Q 15.
Name the part of plant which helps in holding the plant in the soil.
Q 16.
Give names of two plants which have tap root.
Q 18.
What are shrubs? Give two examples.
Q 19.
In which part of a flower you are likely to find the ovary?
Q 20.
Give two examples of trees.
Q 21.
Name the various parts of pistil.
Q 22.
Name a plant that eats insect.
Q 23.
Give two examples of shrubs.
Q 25.
Why are petals colourful?
Q 26.
Explain that sunlight is essential for photosynthesis.
Q 27.
Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Q 28.
What is leaf venation?
Q 29.
How many types of leaf venation are there?
Q 30.
What are fibrous roots?
Q 31.
Does the stem prepare food for any plant?
Q 33.
Classify plants and give an example of each.
Q 34.
Name a plant that has underground as well as aerial (above the ground) root system.
Q 35.
What is the relation between leaf venation and the type of roots?
Q 36.
Explain an activity to test the presence of starch in a leaf.
Q 37.
Explain the important functions of root.
Q 38.
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 39.
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 40.
If a plant has leaves with reticulate venation, what kind of roots will it have?
Q 41.
Name the part of the plant which produces its food. Name this process.
Q 42.
Name two flowers, each with joined and separates sepals.
Q 43.
Are all the plants same in size?
Q 44.
What are the major parts of plants?
Q 45.
What are the raw materials for photosynthesis?
Q 46.
Where does the photosynthesis take place in plants?
Q 47.
Name the types of roots shown in the Fig. 7.7.
Q 48.
What are lateral roots?
Q 49.
Does the stem prepare food for any plant?
Q 50.
What are petals? Why are they generally coloured?
