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.
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.
Give names of two plants which have tap root.
Q 12.
Name the prominent parts of a flower.
Q 14.
Name the part of plant which helps in holding the plant in the soil.
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 20.
Name a plant that eats insect.
Q 21.
In which part of a flower you are likely to find the ovary?
Q 22.
What are the raw materials for photosynthesis?
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.
What are the major parts of plants?
Q 28.
How many types of leaf venation are there?
Q 29.
What are sepals? What are their functions?
Q 30.
What are herbs? Give two examples.
Q 31.
Why are petals colourful?
Q 32.
What do you mean by a complete and incomplete flower?
Q 33.
Explain that sunlight is essential for photosynthesis.
Q 34.
How many kinds of plants are there?
Q 35.
What is transpiration?
Q 36.
Does the stem prepare food for any plant?
Q 37.
Name the part of the plant which produces its food. Name this process.
Q 39.
Where does the photosynthesis take place in plants?
Q 40.
Does the stem prepare food for any plant?
Q 42.
Name a plant that has underground as well as aerial (above the ground) root system.
Q 43.
If a plant has fibrous root, what type of venation are its leaves likely to have?
Q 44.
If a plant has leaves with reticulate venation, what kind of roots will it have?
Q 45.
Name various parts of stamen.
Q 46.
Classify plants and give an example of each.
Q 47.
Pitcher plant has green leaves which can prepare food by photosynthesis then why does it eat insects?
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.
Name the part of the plant which produces its food. Name this process.
Q 50.
Name two plants that belong to herbs.
