Species are considered as
Real units of classification devised by taxonomists
Real basic units of classification
The lowest units of classification
Artificial concept of human mind which cannot be defined in abosolute terms
The possible beneficial affect of grazing animals is the
What is true about the isolated small tribal populations?
Find out the population density when $N$ is $1000$ and $S$ is $100\, m ^{2}$
Salinity of the soil is often caused due to
The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as