Answer:
a) calculating the concentration at which 50% of the test organisms of a particular species die
Explanation:
Bioassays -
<u>Bioassays is an analytical method to assess the effect of marine pollutant on the organism by estimating the concentration at which 50% of the test organisms die after exposing the test organisms for a specified time.</u>
It can be done by quantitative or by qualitative experiment , or direct or indirect .
It is used to detect the biological hazards or give the quality assessment of the mixture .
It is also used for the monitoring the quality of water .
Answer:
causes poverty for people and declines the structure of the economy
Explanation:
people who survive by commercial farming are unable to grow crops and animal rearing for selling as their way of earning income for their families.
As for the economy, it declines very bad that the country too becomes affected. The trading from the country to the other countries becomes disrupted. This also affect the incoming of foreign currency in the country.
