Double fertilization is the process found in angiosperms in which out of the two male gametes released inside the embryo sac, one fuses with the egg cell (syngamy) and another fuse with secondary nucleus (triple fusion).
Double fertilization is the process found in angiosperms in which out of the two male gametes released inside the embryo sac, one fuses with the egg cell (syngamy) and another fuse with secondary nucleus (triple fusion).
Ginkgo is known as a Living Fossil.Anatomy of Ginkgo clearly shows primary and secondary structures. sex in Ginkgo is determined by sex chromosomes (XY in male and XX in female). Reproductive bodies of Ginkgo are most primitive among living seed plants except some Cycadales. Ginkgos are dioecious, with separate sexes, some trees being female and others being male. Male plants produce small pollen cones with sporophylls, each bearing two microsporangia spirally arranged around a central axis. Female plants do not produce cones. Two ovules are formed at the end of a stalk, and after pollination, one or both develop into seeds. The fertilization of ginkgo seeds occurs via motile sperm, as in cycads, ferns, mosses and algae.
INTRODUCTION
DEFINATION
COMPOSITION
STRUCTURE,NUMBER,SHAPE,SIZE
FUNCTION
TYPES OF CHLOROPLAST PLASTID
CHLOROPHYLLS PIGMENT
ROLE OF PHOTOSYNTHESIS
CONCLUSION
REFERENCE
1.Chloroplast is first identified by Engelmann in spirogyra.
2.It is the green pigment found in all plant cell.
3.Chloroplast provides food for plants.
4.Chloroplast was first discovered by Schimper (1864).
Ginkgo is known as a Living Fossil.Anatomy of Ginkgo clearly shows primary and secondary structures. sex in Ginkgo is determined by sex chromosomes (XY in male and XX in female). Reproductive bodies of Ginkgo are most primitive among living seed plants except some Cycadales. Ginkgos are dioecious, with separate sexes, some trees being female and others being male. Male plants produce small pollen cones with sporophylls, each bearing two microsporangia spirally arranged around a central axis. Female plants do not produce cones. Two ovules are formed at the end of a stalk, and after pollination, one or both develop into seeds. The fertilization of ginkgo seeds occurs via motile sperm, as in cycads, ferns, mosses and algae.
INTRODUCTION
DEFINATION
COMPOSITION
STRUCTURE,NUMBER,SHAPE,SIZE
FUNCTION
TYPES OF CHLOROPLAST PLASTID
CHLOROPHYLLS PIGMENT
ROLE OF PHOTOSYNTHESIS
CONCLUSION
REFERENCE
1.Chloroplast is first identified by Engelmann in spirogyra.
2.It is the green pigment found in all plant cell.
3.Chloroplast provides food for plants.
4.Chloroplast was first discovered by Schimper (1864).
A transplastomic plant is a genetically modified plant in which the new genes have not been inserted in the nuclear DNA but in the DNA of the chloroplasts.
The presentation describes the advantages of plastid transformation over 'conventional' nuclear transformation, hurdles to plastid transformation, its advantages. The presentation also covers some successful plastid engineering and its potential.
The pigment chlorophyll is found inside the chloroplasts, each leaf contains millions of chloroplasts. Inside each one, there are stacks of membranes that hold the chlorophyll molecules.
It is a process used by plants & other organisms to convert light energy into chemical energy that can be later used by organisms as a fuel. i.e; energy transformation
The plastid (Greek: πλαστός; plastós: formed, molded – plural plastids) is a major organelle found in the cells of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. They often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell's colour. They possess a double-stranded DNA molecule, which is circular, like that of prokaryotes.
5. Appropriate use of PowerPoint can enhance the teaching
and learning experience for both teachers and students.
A presentation can appeal to a number of different
learning styles and be made more stimulating.
Teachers are encouraged to incorporate more
sophisticated visual and auditory media into presentations
6.
7. INTRODUCTION
•Chloroplast are green,discoid,self-propagating
bodies in the cytoplasm of
plant cells
•They ae green plastids.
•They are concerned with
photosynthesis.
•Chloroplast contains
chlorophyll,carotenoids,DNA
,RNA,Lipids.
8.
9. All green parts of a plant contain chloroplasts
Within a leaf, chloroplasts are mainly found in the mesophyll
layers of a leaf
They are often absent from the epidermis of a leaf
10.
11. Chloroplast is a double membraned structure.
Of which the inner membrane is less permeable
than the outer membrane.
.
12. The space inside the chloroplast is called the
STROMA.
Membranous sacs inside the stroma are the
THYLAKOIDS.
Thylakoids are arranged in stacks called as the
GRANA.
13. Thylakoids contain the chlorophyll pigments.
Stroma contains the enzymes required for the synthesis of
carbohydrates and proteins
14. A pigment called chlorophyll chloroplast
abs
orb
Sun
light
Sun
light
15. Chorophyll make
photosynthetic
parts of a plant green
Chlorophyll absorb mainly
blue and red rays of the
visible light .since the green
light is not absorbed at all ,it
is reflected making the leaves
appear green
16. THANK YOU
GO GREEN ,CONTROL
POLLUTION
TO SAVE HUMAN
RACE IN THIS
EARTH
