2. Remember
Answer the following with the appropriate
response:
• The process in which substances are
absorbed or synthesized in one part of the
plant are moved to other parts of the
plants is called
• Plants can prepare their own food by
the process called
3. Remember
Answer the following with the appropriate
response:
• Plants require and for
the photosynthesis.
• helps in transporting food to all
parts of the plants including roots.
5. Xylem and Phloem
Xylem transport
water and minerals
from roots to all
parts of plants where
as Phloem transport
photosynthetic
products from leaves
to various parts of
the plants.
13. Difference between Xylem and
Phloem
Xylem Phloem
It carries water and
from root to leaves.
It carries food material
leaves to growing parts pf
the plants.
It composed of dead cells. It composed of living cells.
It has a thick cell wall. It has a thin cell wall.
Its cells are made up of Its cells are made up of
cellulose.
It gives mechanical
to the plants.
Phloem doesn't give
mechanical strength.
15. Let’s Answer!
Q2. How can we calculate the age of an
old tree?
Q3. Which type of cells help sieve tube
in the conduction of food?
16. You Answer.
Q1. Match the following columns A with columns B and
select the correct answer.
Column A Column B
1. Xylem
Parenchyma
A. Elongated dead cells with tapering
2. Vessels B. Living cells, thick walled.
3. Tracheids C. Tube-like structure with open ends.
4. Xylem Fibre D. Thick- walled, narrow cells with
ends.
20. Assignment
Q1. Does Xylem carry water or Sugar?
Q2. Why is Xylem dead and Phloem alive?
Q3. If trunk have 30 Xylem ring then what will be
the age of tee?
Editor's Notes
Say: Conducting tissue that is Xylem and Phloem.
Say: As you can see in a picture …. Blue coloured arrow indicating transport of water and minerals from roots to leaves where as Orange arrow indicating transport pf photosynthetic product from leaves to sink or growing part of plants.
Say: Xylem consist of four types of cells namely: Tracheids, Vessels, Xylem Parenchyma and Xylem Fibre.
Say: Tracheids are elongated cells with tapering ends. Their walls have thickening with lateral pores. They provide mechanical support as well as involved in conduction of water and minerals upwards.
Say: vessels are tube-like structures open at both ends . Just like tracheids , they provide mechanical support to the plant and conduct water upwards. They are placed one above the other.
Say: They are also called as wood. They have small , thick walled , living cells. They store food .
Say: They are also known as wood fibre. They have long narrow cells with tapering ends. They provide only mechanical support.
Say: Phloem consist of four types cells namely: sieve tube cells, companion cells, Phloem Parenchyma and Phloem fibre.
Sieve tube are formed of cylindrical cells and they lack nucleus. Their end walls are perforated and are called sieve plate.
Companion cells are attached to side walls of sieve tube and they are living, thin-walled cells.
Phloem parenchyma is not shown in this picture but it is made up thin- walled living cells. Similarly Phloem fibre is madeup of sclerenchyma cells .
Say: The sieve tube play an important role in transporting food through sieve plate. For conduction of food through sieve plate ,companion cells help in it.
Phloem parenchyma store food where as Phloem fibre give mechanical strength to the plant.
