The vinegar removed only the shell of the egg because it was acidic. But it was unable to mess with the egg, because as it removed the shell of the egg, it was unable to get past the sac, the part that protects the inner egg. It is hard to puncture this sac, unless dropped or punctured by a nail or something hard.
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This process is active transport.
Unlike other methods such as diffusion or osmosis, active transport requires extra energy provided by the organism from such as cellular respiration. In addition, they also require a carrier protein, which can change its shape to bring the substance through the cell membrane.
Some examples requiring active transport may include root hair cells absorbing mineral ions, or our small intestine absorbing digested nutrients into our body.
Answer:
c) small plants grow but eventually replaced by larger plants.
<u>Answer:</u>
<em>The biological macro molecule protein can serve as a precursor to the production of cyanide.
</em>
<u>Explanation:</u>
<em>Cyanides are chemical compounds that contain the cyanide group(C≡N). </em>Based on the elements attached to the cyanide group cyanides can be classified into organic and inorganic cyanides.
<em>In inorganic cyanides the cyanide group is present as 
ion which makes them toxic. In organic cyanides group is not present and thus they are less toxic. </em>
Since nitrogen is the essential component in a cyanide, a biomolecule containing nitrogen will best act as the precursor to cyanide formation.
<em>The biomolecule protein is a long chain polymer of amino acids that contain nitrogen group. Thus proteins can act as precursor to cyanide formation.
</em>
The correct answer is ocean
The water that is naturally occurring in the nature expect the seawater, water in the ocean, backish water is freshwater.
The least likely fresh water reservoir is ocean water, which is salty in nature. This has high concentration of dissolved salts in it.
This water cannot be used as potable water employed for the commercial and drinking purposes.
