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 .
The plight of refugees is that they suffer deep emotional stresses from displacement. Fleeing their lives in search of a safer place for them to have a future brings with it poverty, fear and health issues. Upon arrival in a new country, I think that they should be treated with equality, dignity and be given the resources and tools from our society to enable them to build a new life for themselves. After their suffering and journey to seek a better place and better life, societies should embrace these people, their skills and abilities and allow them to be a part of other cultures.
<span>We're is Dallas using latitude and longitude
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that would be 32.7767° N, 96.7970° W
Answer:
Changes in solar energy
Explanation:
When released into the atmosphere, certain gases act like a blanket, preventing heat from escaping. One of the most important heat-trapping gases is carbon dioxide (CO2), which is released when we burn fossil fuels like oil, coal, and natural gas.
Once released, carbon dioxide stays in the atmosphere for roughly 40 years, though its effects stay much longer; other gases, like methane, are even longer-lived. The cumulative effect is to raise the planet’s temperature.
