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 .
Seasons<span> happen because </span>Earth's<span> axis is tilted at an angle of about 23.4 degrees and different parts of </span>Earth<span> receive more solar energy than others. ... Around the June</span>solstice<span>, the North Pole is tilted toward the Sun and the Northern Hemisphere gets more of the Sun's direct rays. I hope this helps out have a good day and good luck on your work!!!
</span>
The massive rain forest is one of the major barriers to travel in the Congo region. The correct option among all the options that are given in the question is option "c". This rain forest is very dense in some places and it is almost impossible to pass through it. I hope the answer helps you.
Baku is the capital of Azerbaijan.
The correct answer of the given statement above would be TRUE. It is true that deep within the jungle of Mexico and Guatemala lie most of the Mayan ruins. Mayan ruins are found throughout Mexico, Belize, Honduras and Guatemala. Hope this answer helps.
