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 .
There are seven provinces that are either entirely or partially located between 50 N and 60 N.
Explanation:
Canada is a vast country, in fact it is the second largest in the world. The country is located on high latitude, and more than half of its mainland territory is between the latitudes of 50 N and 60 N. The provinces are very large, and each of them is larger than big portion of the countries in the world. In the southern half of the country, the provinces tend to be arranged in an east to west manner, kind of by longitude.
- There are ten provinces in Canada.
- Seven out of the ten provinces are entirely or partially between the latitudes of 50 N and 60 N.
- The provinces located between these latitudes are Newfoundland, Quebec, Ontario, Manitoba, Saskatchewan, Alberta, and British Columbia.
- The three other provinces, Nunavut, North West Territory, and Yukon Territory, are located further north, mostly between 60 N and 70 N.
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Answer: An orthophoto is an undistorted aerial photograph with a completely uniform scale that allows it to function as a map
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