Total fertility rate, Biology

Assignment Help:

Total Fertility Rate

Total fertility rate (TFR) is the total number of children a women can be expected to bear in a given population if birth rates are constant for at least one generation. Replacement level is a value of TFR and is the number of children a couple must have to replace themselves. You might think that two parents would have to have only two children to replace themselves.

The actual average replacement level is, however, slightly higher, primarily because some children die before reaching their reproductive years. In developed countries the replacement level is fixed at 2.1. In developing countries where infant mortality rates are high and life expectancies are short, replacement level is about 2.7. If replacement level is low-below 2 i.e. each couple has children less than those required to replace themselves, then the population will actually decline as in the case of Sweden and Germany.


Related Discussions:- Total fertility rate

Examine multiple variation parameters for a genomic region , Determine SNP ...

Determine SNP variation among the aligned DNAs for a genomic region.   See below for how to count SNP variation.  The output file (Your_name_snp.txt) should have two

Chemical energy to be used by the living beings on earth, Q. How is the lig...

Q. How is the light from the sun transformed into chemical energy to be used by the living beings on earth? Light from the sun is converting into chemical energy contained in o

INVERTIBREATHE, #question.WRITE THE CHARACTER AND CLASSIFICATION OF MOLLUSC...

#question.WRITE THE CHARACTER AND CLASSIFICATION OF MOLLUSCA ?

Write short note on ames test, Question 1 Describe any two possible mec...

Question 1 Describe any two possible mechanisms of mutagenesis 2 Explain any five functions of Endoplasmic reticulum 3 Write short note on Ames test 4 Describe the structure an

Mycotoxins, Fungi are a very diverse group of organisms and have a signific...

Fungi are a very diverse group of organisms and have a significant impact on the production, spoilage and safety of food. Molds have not only served to synthesize antibiotics but a

Is herbivorism a form of predatism, Q. Is herbivorism a form of predatism? ...

Q. Is herbivorism a form of predatism? The Herbivorism is a form of predatism in which first order consumers feed from producers (plants or algae). For instance, fruits and bir

Smoking of meat products, S m o k in g of Meat Products The purpos...

S m o k in g of Meat Products The purpose of smoking meat is to develop a distinctive flavour, aroma and appearance. These attributes can also be achieved with liquid smok

What do digestive enzymes do to food, What do digestive enzymes do to food?...

What do digestive enzymes do to food? Digestive enzymes suspend food; make food soluble, break large insoluble food molecules into smaller, soluble molecules

Why protein requirements of athletes get increased, Why Protein requirement...

Why Protein requirements of athletes get increased? Protein requirements of athletes, particularly those engaged in strength and power events, may be increased above those of s

Louping ill, Louping ill This is an infectious encephalomyelitis of sh...

Louping ill This is an infectious encephalomyelitis of sheep and man occurring during spring and summer when the vectors like ticks are active. It is reported from British Isl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd