a presentation on different plants form and functions of avijit chowdhury&nilesh majumdar
TRANSCRIPT
PICTURE OF A SHURBA Shrub is plant
which has branching stem near the base. In shrub the stem are hard but not very thick.
PICTURE OF A HERBPlants with green
and tender stems are called herbs . They are usually short and may not have many branches.
PICTURE OF A TREESome plants are very
tall and have hard and thick brown stem. The stem have branches in the upper part, much above the ground. Such plants are called trees.
PICTURE SHOWING DIFFERENT PARTS OF APLANT
Generally a plant is mainly divided into two parts –
Root system.Shoot system. The part of the plant
above the ground is called shoot.
The part of the plant below the ground is called root system.
ROOT SYSTEMThe part of the plant
under the ground is called root.
Roots hold the soil thus gives strength to the plant
Roots absorb water and minerals from the soil.
Some time roots also store food for future use.
Roots are of three types – Tap root Fibrous root Prop root.
PICTURE OF PROP ROOTProp root are the
roots that grow from the branches. As this roots reach the ground , they fix themselves in the soil and give support to the spreading branches of the tree.
PICTURE OF FIBROUS ROOTA number of thin fibre
like roots arise from the base of the stem. They spread out in the soil and give support to the plant. This are known as fibrous root.
PICTURE OF A SHOOT SYSTEM
The upper part of the plant above the ground is called shoot system.
Generally a shoot system contains -
Stem. Leaf Nodes Internodes Buds Flower Fruits
PICTURE SHOWING TRUNK AND BARK OF A TREE
The stem of tree is called trunks. They are thick, woody and strong.
The outer, protective covering of trunk of a tree is called bark
PICTURE SHOWING TENDRIL
Thin thread like structre on the stem which are modification of the stem and are known as tendrils.
PICTURE SHOWING SPINESSpines are modified
form of leaf. With the help of spines a plant can restrict loss of water by evaporation. It also acts as a protective organ.
PICTURE SHOWING A LEAFLeaf is a part of shoot system
which makes food for the plant by photosynthesis. Generally a leaf is green in colour due to the presence of Cholorophyll. Sometimes leaf may be of different colour
A leaf has – LaminaPetiole Midribs Veins
PICTURE SHOWING A FLOWER
A flower is that part of a plant which take part in reproduction.
A typical flower contain – Pedicei Thalamus Sepals Petals Stamen Filament Anther Pollen grain Pistil Ovary Stigma Style
PICTURE SHOWING FRUIT.A fruit is a
reproductive product of a plant.
A fruit contains seed.A seed contains baby
plant called embryo.The embryo contain
plumule and radical.The plumule grows
into shoot and the radical grows into root.