Direct observation
indirect observation
random sampling
mark-and-recapture
Answer:
Explanation:
Biosphere is the portions/regions of the earth (including land, sea and atmosphere) where living organisms exist. From the picture attached, it can be seen that there are living organisms in the hydrosphere (fishes), geosphere (plants) and anthrosphere (human). The entire system should have been labelled biosphere and not atmosphere.
NOTE: Atmosphere is an empty air space surrounding/around the earth (or other celestial body).
Membrane potential is the difference in electric potential between the interior and the exterior of a biological cell. Membrane potential is a potential gradient that forces ions to passively move in one direction: positive ions are attracted by the 'negative' side of the membrane and negative ions by the 'positive' one.
The survival of the cell depends on chromosome integrity.