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What is demography?
The scientific study of human population is termed as 'Demography'. It focuses attention on three readily observable human phenomena:
a) Changes in population size (growth or decline),
b) The composition of the population, and
c) The distribution of population in space.
What is Physical activity ratio? Physical activity ratio (PAR): The energy cost of an activity per unit of time (usually a minute or an hour) expressed as a multiple of BMR. It
Which of these lists contains the four postulates of natural selection? Which of these lists contains the four postulates of natural selection? Uniform population, heritable trait
Protection of our property: · If any our property lies in an area prone to landslides, we should seek advice of experts in earth movement and take cor
Q. Comparative picture of ecosystem? An ecosystem having higher diversity means the number of species and interactions between them which constitute the food web, is large. In
What are the specialized structures that help the adhesion between cells? The structures responsible for the union of the epithelial cells are known as cell junctions. The main
Explain about the forces acting on a gravity retaining wall. Forces Acting on a Gravity Retaining Wall: In a general way the forces that act on a gravity retaining wall. The
Defence mechanisms of the host The healthy animal is protected from pathogenic organisms present in the environment by virtue of the effective immune mechanism present from bi
How is gas exchange done in flatworms? Platyhelminthes exchange gases exclusively by diffusion by their body surface. This is only possible because all cells are localized rela
A patient has a low red blood cell count, and microscopic examination reveals an abnormally high proportion of circulating reticulocytes. Upon subsequent examination, the patient i
biological significance of biology
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