Sure. Single-cell organisms include bacteria and hens' eggs.
The answer is c. surface tension. These insects usually can make big area interact with water surface and is light itself. So the surface tension can bigger than the pressure.
Answer:
Industry data show that 59% of HFC 134a ever produced has already been release into the atmosphere (along with 80% of the main HCFC in the market, HCFC 22). According to recent investigations, about 60% of HFC<u> emissions arise from routine leaks from refrigeration and air conditioning.</u>
Explanation:
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The answer is A, because the 'filling' is the jelly like cytoplasm and the edge is the cell wall
. To be useful as index fossil