Hypothetical age pyramids, Biology

Assignment Help:

Hypothetical Age Pyramids

The three types of hypothetical age pyramids which are as follows:

1) A pyramid with a broad base, indicating a high percentage of young individuals in a population. This shows that population is expanding exponentially.

2) A triangular or bell shaped pyramid indicating moderate proportion of young to old individuals. This is the characteristic of a stable population where natality equals mortality.

3) An urn shaped figure indicating a low number of young individuals. This pyramid is the characteristic of aging or declining population.

404_Hypothetical Age Pyramids.png

Figure: Three types of age pyramid showing large (1) moderate (2) and small (3) number of young individuals in a population. Vole population under laboratory conditions is shown expanding (a), and stable (b) age pyramids.


Related Discussions:- Hypothetical age pyramids

According to their morphology how are bacteria classified, According to the...

According to their morphology how are bacteria classified? Bacteria present dissimilar morphological patterns. A bacterium can be classified into coccus, bacillus, vibrion or s

What is an open circulatory system, What is an open circulatory system? ...

What is an open circulatory system? Open circulatory system is the one in which blood does not circulate only in blood vessels but it also falls in cavities that irrigate tissu

Functions of kidney, FUNCTION S OF KIDNEY - 1.      Excretion of nitro...

FUNCTION S OF KIDNEY - 1.      Excretion of nitrogenous wastes. 2.      Maintenance of water balance or osmoregulation. 3.      Acid base balance or regulation of pH.

Why does the urinary volume increase, Why does the urinary volume increase ...

Why does the urinary volume increase when alcoholic beverages are ingested? Alcohol inhibits the ADH (antidiuretic hormone) secretion by the hypophysis. Low ADH decreases the t

Eucaryotic cell organelles, Eucaryotic Cell Organelles A eucaryotic cel...

Eucaryotic Cell Organelles A eucaryotic cell has excessive foldings of intrace!:u:;ir cembrane as compared to procaryotic cell. The eucaryotic cell has a number of'organelles s

Effect of destruction of microbial barriers, Q. Effect of Destruction of Mi...

Q. Effect of Destruction of Microbial Barriers? Physical damage to the integument allows microbial invasion of the underlying nutrient-rich tissues and it is a common observati

Use mathematical calculations to justify the answer, Using an average wavel...

Using an average wavelength of 450 nm (0.45 um) can you resolve two objects that sit greater than 200nm apart from one another? Use mathematical calculations to justify your answer

Other complications of prosthetic valves, Other Complications of Prosthetic...

Other Complications of Prosthetic Valves :  One of the dreaded complications of mitral valve replacement is ventricular rupture. It is difficult to manage and so it is better avoi

Typical components of a closed circulatory system, Q. What are the typical ...

Q. What are the typical components of a closed circulatory system? The typical components of the closed circulatory system are the blood vessels within which blood circulates c

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