What is primary productivity? Give brief description of factors that affect primary productivity. </h2>&l…

In structure of an ecosystem, composition of biological communities include:<span><br> </span></h2&…

Which of the following is a major constituent of DNA and RNA?

Construct an ideal pyramid of energy when 1,000,000 joules of sunlight is available. Label all its trophic levels.&n…

Which of the following elements have only the sedimentary type of nutrient cycle?</h2></div>

In an ecosystem, the population of</h2></div>

<span>The pyramid of biomass represents the relationships that exist between the quantity of living matter (biomas…

What is an ecosystem?</h2></div>