Transcript CONSTRUCTIVIST PLAN Subject: Science Class 9th Duration 35 Minutes Topic :- Tissue Sub Topic------- Plant Tissue.

CONSTRUCTIVIST PLAN
Subject: Science
Class 9th Duration 35 Minutes
Topic :- Tissue
Sub Topic------- Plant Tissue
General Objective
To Promote Spirit of enquiry, Experimentation
and Observation.
To interpret the impact of various phenomenon
in our daily life.
To promote problem solving and decision
making attitude.
To inculcate scientific attitude.
Specific Objectives
At the end of the lesson students will be
able to:
1.Identify cells and Tissues.
2.Recognize meristematic tissue in
plants and their function
3. Differentiate permanent tissues &
complex tissues.
4.Recognize Constituents of phloem and
xylem
Motivation
Plant Cell
Tissue
P.K. Testing
1. What is cell?
2. Do you know prokaryotic and
eukaryotic cells?
3. What are unicellular and multicellular
organisms?
4. What we call group of cells?
Presentation
What is Tissue ?
A group of cells that are similar in structure and
functions form tissue.
Tissue
Primary Cell Wall
Types of Tissues
Plant Tissue
Meristematic Tissue
Animal Tissue
Permanent Tissue
Apical Meristem Intercalary Meristem
Lateral Meristem
Meristematic Tissue
“The tissue which is made up of dividing Cells ”
It is also known as dividing tissue which helps
in growth of plants. It lies at certain specific
regions of plants .
Apical Meristem:-
These are present at the growing
tips of stem and root and help to increase their length.
Shoot Apex
Root Apex
Intercalary Meristem:- It is present at the base of
leaves and internodes and helps in longitudinal growth
of the plant.
Lateral Meristem:-
These meristems are present
in that areas of the plant where girth is required, so it
increase the girth or diameter of the stem or roots.
Meristematic Tissues
Section showing increase in girth
ACTIVITY
• Take two glass jars and fill them with water.
• Now, take two onion bulbs and place one on
each jar, as shown in fig.
• Observe the growth of roots in both the
bulbs for a few days.
• Measure the length of roots on day 1,2 and
3.
• On day 4, cut the root tips of the onion bulb
in jar 2 by about 1 cm. After this observe the
growth of roots in both the jars and measure
their lengths each day for five more days and
record the observations in tables
Group Formation
Apical
Intercalary
Lateral
Permanent Tissue:•
These are specialised cells .
•
They do not divide.
Permanent tissues are of two types:-
(a)Simple Permanent Tissue
• They are composed of similar types of cells & are
of three types:(1)Parenchyma :• thin cell wall
• living cells
• loosely packed
• intercellular spaces
• store food.
(
2) Collenchyma :
• cell wall thickened
• living cells.
• Intercellular spaces are very
few.
• provides rigidity with
flexibility.
• Sclerenchyma :Cell wall highly thickened
•Cells are dead
• Intercellular space is absent
•Provides mechanical support
•
(b) Complex Permanent Tissue:
 different kinds of cells.
 They are of two types:1. Xylem
•Tracheids,
•Vessels,
•Xylem parenchyma,
•xylem fibres.
2.Phloem :•
•
•
•
Sieve tubes,
Companion cells,
Parenchyma,
Phloem fibres.
Group Activity
(TEACHER WILL MAKE 4 GROUPS)
Tissue Group:
What is the utility of tissues in multicellular
organisms?
Apical Group
1.What is the role of apical meristem in plants?
2.Show the location of apical meristematic
tissue in plant body?
3Write different kind of simple permanent
tissues?
Intercalary Group
•What is the role of intercalary meristem?
•Name the meristem which increase girth in
plants.
•Name different types of phloem elements.
Lateral Group
• Show the location of intercalary and lateral
meristem in plant body?
• What is the role of lateral meristem in plants?
• Name different xylem elements.
Presentation by the students
• The students have completed their activity
work and answered the asked questions by
group discussion and active participation.
Evaluation of the students by
the teacher
1. What is tissue?
2. Are plants and animals made up of same
tissue?
3. Do animals and plants have same structure?
4. How many types of tissue are present in
plants?
Home Assignment
• Draw the structure of meristematic tissue.
• Write the functions of different kinds of
meristematic tissue.
• Draw the labelled diagram of different
element of xylem and phloem along with their
function
Question Bank:
Q.1. Tick the correct option:
I. Choose the multicellular organism
(a) Amoeba (b) Paramecium
(c ) Man
(d) Euglena
II.Tissue is made up of:
(a) Same cells with different functions.
(b) Different cells with different functions.
(c) Different cells with same funtions.
(d) Same cells with same funtions.
III. Tissues are of ……………. Types:
(a) 3 (b) 4 (c ) 2 (d) 5
IV. Where is apical meristem founds?
(a) Nodes
(b) Internodes
(c ) Cambium
(d) Tips of stem and roots.
Q.2. Fill in the blanks:
I. The girth of the stem increases due to ………………………………………………………
II. Amoeba is …………………………. Organism.
III. Intercalary meristem is present at the ………………….. Part of the plant.
IV. Apical meristem increases ……………………. Of the plant.
Q.3. True/false:
I. Animals and plants have same functions.
II. Meristematic tissue is a dividing tissue.
III. Apical meristem is found at the internodes of the plant.
IV. The girth of the stem increases due to intercalary meristem.
Q.4.Label the diagram:
Q.5. What is tissue?
Q.6. What is the utility of the tissues in multicellular organisms?
Q.7. Differentiate between apical, intercalary and lateral meristem
with the help of diagram.