Answer:
The correct answer is option A, that is, cotransport proteins.
Explanation:
The variable that possesses the tendency to mediate energy based on chemical potential is termed as an electrochemical gradient. The electrochemical gradient is differentiated into two parts, that is, electrical gradient and chemical gradient. Both these forms of gradient take place over the surface of a membrane.
The movement of the majority of the ions takes place by the phenomenon of electrochemical gradients, of which some are found on the surface of the membrane and function as electrogenic pumps. While the gradients of some of the ions are mostly accounted for by the co-transport proteins, as these proteins take part in the movement of ions or molecules through a plasma membrane that involves concentration gradient based on the kind of molecules and movement.
The correct answer is option d. its absence would affect many organism present in the community.
The keystone species are the one, who play a very important role in the ecosystem. In case, the keystone species is wiped off from a particular ecosystem, then the function of the ecosystem would cease and lead to a major effect. Hence, the keystone species is very important for the survival of ecosystem.
Wind isn’t an external force that acts in the rock cycle.
