C. A wall of stones and mortar
This would act as a model describing the cell membrane.
Explanation;
A cell membrane is made up of a phospholipid bilayer with embedded proteins.
A cell membrane hold the different components of the cell together and to protect it from the environment outside the cell. It acts as a boundary between the inside environment and the outside environment of a cell.
It regulates the materials that enters and exits the cell; through selective movement of substances in and out of the cell.
Aesthetic potentially due to the decay but also environmental
Answer:
a biosphere contains the largest number of individuals.
Explanation:
Sunlight
solar energy
water
Option C. Organisms were probably more complex during past eras.
