With a country as big as Russia, it is hard to give you an accurate estimation. Siberia is known for some of the coldest winters in the world, reaching a very dangerous -35 degrees Celsius. The north pole of cold has a record breaking -69 degree celsius winters. over 65% of Russia is covered by permafrost. There is a humid continental climate as well.
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: B. temporarily or permanently suspended in the flow
Explanation:
Suspended load refers to the sediments in a flowing waterbody that do not settle to the bottom but rather continually move with the motion of the water. They are therefore temporarily or permanently suspended in the flow.
They are usually made up of light and fine particles which can easily be moved such as silt and fine sands.
<span>They have a command economy because the government regulates each aspect of the economy.</span>
