A thin, moist, selectively, permeable membrane.
Hundreds of years. This process is called succession.
Answer:
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells
So you do A^2 + b^2=C^2
(12X12)+(16X16)= 256+144=400 then fine the square root which is 20 so the answer is 20!
Hope I could help!
D. parasitism
The flea is gaining nutirents but since the dog is being harmed the flea is a parasites
