Proton pumps are used in various ways by members of every domain of organisms: Bacteria, Archaea, and Eukarya. What does this most probably mean?
A) Proton pumps must have evolved before any living organisms were present on Earth.
B) Proton gradients across a membrane were used by cells that were the common ancestor of all three domains of life.
C) The high concentration of protons in the ancient atmosphere must have necessitated a pump mechanism.
D) Cells of each domain evolved proton pumps independently when oceans became more acidic.
E) Proton pumps are necessary to all cell membranes.
The 20 amino acids found in living organisms
As sessile organisms, plants have evolved many mechanisms to mitigate the potential damage of abioti
Some organisms used as models in genetic research
Some organisms used as models in genetic research
Members of the Lemba ethnic group from southern Africa.
How to find the domain of a function (Part 2)