Tree bark is made up of plant cells
Soil bacteria is made up of prokaryotic cells
Fingernails are made up of cells.
Hence the only possible option is river water which is made up of H2O along with other microorganisms
Less concentrated as, by osmosis, the water moves up the concentration gradient into area of most concentration.
Answer:
3rd option) moon’s motion without gravity
Answer:
is 26.25 N
Explanation:
Given that:
= 20 N,
= 17 N.
This implies that the two forces are acting at right angle to each other. Thus applying the Pythagoras theorem, we have;
= 
= 
= 
= 
= 26.2488
= 26.25 N
The net force is 26.25 N.