If the biochemical oxygen demand (bod) of a lake is very high, how will that affect the aquatic life in the lake? view available
hint(s) if the biochemical oxygen demand (bod) of a lake is very high, how will that affect the aquatic life in the lake? there will be more oxygen available for the aquatic life but much less oxygen available to the microbial populations. there will be less oxygen available for the aquatic life due to the microbial activity. there will be more oxygen available for the aquatic life due to the microbial activity. the bod does not have an impact on available oxygen in the lake.
The answer is ‘there will be less oxygen available for the
aquatic life due to the microbial activity’. Too much microbial activity utilizes
the oxygen dissolved in the water hence making
the waters anoxic. This occurs especially after algae
blooms. When the algae grow exponentially
and later die, microbes that oxidize the organic matter for energy utilize the oxygen and cause dissolved
oxygen in the water to deplete. This hence suffocates
other aquatic life.
A physical change occur when objects or substances undergo a change that does not change in which the composition of a substance changes or one or more substances combine or break up from new substances.
This specimen is also far too old for C-14 dating to be accurate, as well as for any other technique but palaeomagnetic dating.
Explanation:
The second part of the sentence is not accurate, since the remains were dated by uranium-lead dating. Carbon-14 dating measures ages in the tens of thousands of years, and uranium-lead dating measures in the millions to billions of years.
