The water would freeze across the surface of the lake, blocking the dissolving of oxygen and nutrients. <span>Water is actually less dense when frozen, which is why ice cubes and ice bergs all float. This is also why you can ice skate on a lake if the ice gets thick enough on the surface. Many organisms that live in freezing lakes have special adaptations which help them survive.</span>
Blood plasma transports nutrients, waste (like uric acid, creatinine, and ammonium salts), albumin (protein), and electrolytes.
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Answer:</h2>
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<em>OPTION</em><em> </em><em>B</em><em> </em><em>IS</em><em> </em><em>THE</em><em> </em><em>CORRECT</em><em> </em><em>ANSWER</em></h3>
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Explanation:</h2>
<h3>Nucleocytoplasmic exchange of materials</h3>
<h3>In eukaryotic cells, the nucleus is bound by a double membrane or nuclear envelope. It possesses openings at certain intervals called as 'nuclear pore'. Nuclear pores are large protein complexes regulates the exchange of material between nucleus and cytoplasm, i.e., nucleo-cytoplasmic exchange of materials. </h3><h3 />
Answer:
Human skin pigmentation is the product of two clines produced by natural selection ... The populations exhibiting maximally depigmented skin are those ... &c., are of the nature which it might have been expected would have been ... The evolution of light pigmentation at high latitudes has long been related ...
Explanation:
The collective effective dose is the sum of the individual doses received in a given period by a specific population from exposure to a specific source of radiation. It is the dose Quantity S, calculated as the sum of all individual effective doses over the time period or during the operation being considered due to ionizing radiation. It may be used to estimate the total health effects of a process or accidental release involving ionizing radiation to an exposed population.
