What is the Role Mutation in Plant Breeding and Evolution?
Plant breeding aims at improving the crop quality but improving the heredity through the cross hybridization technique.
Tag Archives | evolution
Process of evolution of the State from the primitive times to the modern Nation State
Process of evolution of the State from the primitive times to the modern Nation State. The process of this evolution has not been uniform due to difference in the conditions under which the state developed at different places and times.
Brief note on the evolution of atmosphere
The earth’s cover of gases is called the atmosphere. It is extended up to 40 km. Gases re distributed thinly above this. On the surface of the earth, the atmosphere consists of mainly nitrogen…
Useful information on the evolution of man
It is an Oligocene fossil. It was excavated from Fayum province of Egypt. The animal has size of squirrel. It is believed to the ancestors of old monkey.
Write notes on role of variation on evolution
No two organisms or parts of an organism are precisely alike. We experience a particular man is different from others. A particular cow, sheep, or goat can be indentified in a herd. Thus, individuals of the species vary from one another in some way or other. Organisms have tendency to vary.
Write a note on fossil evidence of evolution
Branch of science that deals with fossils is called palaeontology. Fossils are remnants of plants and animals or their parts and impressions in the form of rocks in the crust of earth. The fossils were formed in the long past when earth containing organisms was covered with rocks.
Complete information on the Lamarckian theory of evolution as well as on Neo-Lamrckism
Lamarck was a French biologist. He was the first biologist to explain a definite theory of evolution. He was also first man to coin the term biology. He focused on the phylogenetic tree or tree of life to show the phylogenetic relationship among the organisms.
Complete information on embryological evidences of evolution
The embryology or the developmental history of animals offers unique proof of evolution. All the multicellular sexually reproducing organisms start their life from fertilized eggs, which are single cells. With the progress of development, two and three germinal layers are produced in the embryos.
Complete information on the anatomical and palaeontological evidences of evolution
The external, internal as well as comparative anatomy of vertebrates indicates the occurrence of organic evolution. Organs which are similar in basic structure and development whatever varied functions they may be performing are called homologous organs. Homology is observed in the limbs, hearts, brain of vertebrates, appendages of arthropods, etc.
Complete information on the modern theory of Evolution
Recent knowledge in genetics, molecular biology, cell trilogy, etc. has influenced the triologists to include all the phenomena that guide the process of evolution into one theory called Neo-Darwinism or modern synthetic theory.