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Q. What are persistent organic pollutants (POPs)?
The POPs, or persistent organic pollutants, are toxic substances formed from organic compounds. The POPs are made in several industrial processes, like the production of PVC, paper whitened by chlorine, herbicides, insecticides and fungicides, and as well in the incineration of waste. Instances of POPs are dioxins, furanes, heptachloride, chlordane, DDT, dieldrin, toxaphen and hexachlorbenzene.
The POPs are highly harmful and toxic since, like the heavy metals, they are bioaccumulative, that is they are not degraded by the body and accumulate even more in each following trophic level of the food chains. In humans the POPs can cause nervous and cancer, immune and reproductive impairments.
Q. Define Bioinert materials? Bioinert materials are chemically inert in the body and exhibit minimal chemical interaction with adjacent tissue such as titanium and alumina (Al
In the metagenesis of Aurelia and Obelia what is the form that produces gametes? What is the form that reproduces asexually? In the metagenesis of some coelenterates, like Obel
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classify cobra
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What are the five conditons that can cause evolution to take place?
the s phase of interface is important and a cell can newer divide without it justify?
Classification of Living Organisms The world of living organisms is extremely diverse. Biologists call these diverse forms 'species'. It is estimated that over fifteen lakh (1
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