Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Four Distinct Phases of Demographic Transition
Demographic transition takes place in four distinct phases.
1. Re-industrial stage in which harsh living conditions lead to high birth rates to compensate for high infant mortality and high death rates. This leads to little population growth.
2. Transitional stage which starts shortly after industrialisation begins. At this stage death rates drop as a result of increased food production and better sanitation and health care. Birth rates remain high, population grows at a high rate (2.5-3% per year) for a long period but begins to level off later as living conditions improve.
3. Industrial stage in which industrialisation is widespread. Birth rates fall and eventually approach death rates, as people after moving to cities realise that it is more to their advantage to raise small families in an expanding economy.
4. Post-industrial stage in which birth rate equals death rate thus leading to zero population growth (ZPG) Birth rate continues to fall so that the population size begins to decline slowly.
In certain instances differences in the morphology of genitalia between species make it impossible for normal mating to occur, and sympatric species tend to remain isolated. When t
VAS A DIFFRENTIA - Originate from wollfian duct . It comes out fo cauda epdidymis enters into abdominal cavity through inguinal canal, forms loop round the uretor and j
Explain Structural protiens Structural proteins are fibrous proteins. The most familiar of the fibrous proteins are probably the keratins, which form the protective covering o
Minerals :- Sulfur Food Source Widely distributed Nutritional Functional role Essential nutrient: A constituent of the essential amino acids methionine and
LIPOIDA L MODELS According to Overton (1902) plasma membrane consists of single layer of lipid, because cell permeability is related to lipids. According to Gorter and
Q. What is the incubation period of an infection? The Incubation period is the time interval between the infection by an agent that causes disease and the first signs or sympto
Q. What are the three types of germ layers that form tissues and organs in animals? The three germ layers are the mesoderm, the ectoderm and the endoderm.
General characteristics of phylum
Q. List the functions of insulin? a) Insulin controls the level of the sugar (glucose) in the blood. b) Insulin permits cells to use sugar (glucose) for energy. Cells cannot
Why plants need to do exchange gases with the environment? The Plants need to do gas exchange because they create aerobic cellular respiration (like animals) and they need to r
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd