1/2, anything divided by 1 is always going to stay the same, also as anything divided by 0.
+/+ = mutualism
+/0 = commensalism
+/- = parasitism or predation
According to the cell theory all living cells come from living cells by multiplying. The cell theory states that: All living things are made up of cells. Cells are the basic unit of living things.
Answer:
the answer is d
Explanation:
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Answer:lipid bilayer are essentially impermeable to polar solutes
Explanation:the cell membrane is a phospholipid bilayer.it is composed of lipids,proteins and carbonhydrates attached.the lipid bilayer forms the bulk of material on the membrane as a result it is impermeable to the movement of polar molecules in and out of the cell.small and non polar substances can pass through the bilayer of the membrane. the lipids and proteins occurs in varying composition in the membrane, depending on the
cell .the membrane has both a hydrophobic end and a hydrophilic end.the hydrophobic ends of the membrane folds toward each other.while the hydrophilic end is exposed to the water phase.the membrane is very flexible and thin and acts as a barrier that separates the cells external and internal environment
