WEEK 6 CROP PLANT FORM Jss1 First Term Agricultural Science

WEEK 6
DATE:…………………….
TOPIC: CROP PLANT FORM.
CONTENT:i. Plant parts
     ii.
Functions of each plant parts.
Sub – Topic 1: Different parts of plants
Plant form refers to the shape of a
plant. Flowering plants have two regions: the shoot region, which is found
above the ground level and the root region which is found below the ground
level.
PARTS OF A FLOWERING PLANTS
A flowering crop plant has the
following parts
       
The leaves
       
The flowers
       
The branches
       
The stem
       
The roots
Flowers, leaves, branches and stem
comprise the shoot region or system while the different roots comprise the root
regions system.
EVALUATION
Differentiate
between shoot system and root system and name their parts.
Sub – Topic
2   Functions
of the parts of a plant
The
leaves:
   The
leaves of a plant perform the following functions.
       
Manufacture food through the process
of photosynthesis
       
Some leaves store food e.g. onions,
cabbage, waterleaf.
       
Some leaves are used for propagation
e.g. Bryophyllium
       
The leaves permit air to enter
leaves the plant through the stomata.
       
The leaves give the shape of the
plant.
The
flowers:
  The
functions of the flowers include the following.
            
Bright scented flowers attracts
insects for pollination
            
The flowers produce the fruits and
seeds
            
Some plant flowers are eaten by man
            
Use for decoration/they adds beauty
to the plants.
            
They release sweet odour.
The
branches:
The function of the branches
includes the following
       
They help to hold the leaves and
fruits in shape
       
Some plant branches are used for
propagation.
The
stem:
The functions of the include:
       
They help to transfer food nutrients
from the roots up to the leaves and flowers.
       
Also, it brings down the
manufactured food form the leaves to other parts of the body
       
They are used for propagation e.g.
cassava stem
       
It carries the branches, leaves and
flower
       
Some plant stems store food e.g.
yam, Irish potato and sugar cane.
The
root:
The functions of the roots include
       
It holds the plant firmly to the
ground
       
It absorbs minerals and water from
the soil.
       
Some plant roots store food e.g.
cassava and carrot
       
Some plant roots are medicinal.
 Diagrams
 Parts of flowering plants 

Leaf      Flower                Stem          Branches        Fruits
EVALUATION
1. Outline
two functions each of
       
The leaves
       
The flowers
       
The branches
2. State
any 3 functions each of the stem and the root.
Assignment:
Students to get any of the part of
the plant, identify and draw it, and write its functions
Junior secondary Agriculture
(workbook 1)byAnthony.Youdeowei et-al page 5-7,16.
REFERENCE
TEXTS
:
    
Intensive Agricultural Science for
J.S.S. 1, 2 & 3 by E. U. Okaro.
    
Essentials of Agricultural Science
for J.S.S. & Colleges by Earnest ChukwudiAnie.
    
Agricultural Science for JSS (Upper
Basic Education) by L. A. Are et al.
    
Prescribed Agricultural Science for
J.S.S. by S. E. Omoruyi et al.

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