Hi lovely,
The answer you're looking for would be D) Gene Pool
Based on the nature of proton gradient, (A) is false, but (R) is true.
<h3>What is a proton gradient?</h3>
A proton gradient is a gradient that exists due to difference in proton concentration between the inner and outer mitochondrial matrix.
An assertion is a statement or claim stating a given position.
- Assertion (A): A proton gradient cannot be established in the mitochondria.
- Reason (R): Hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria.
The assertion, A, is false because a proton gradient is established in the mitochondria due to the function of the proton pump which pumps out protons from the inner mitochondrial matrix to the outer membrane.
The reason, R is true as hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria by the proton pump.
Therefore, (A) is false, but (R) is true.
Learn more about proton gradient at: brainly.com/question/1602075
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The correct answer is - hierarchical
Each entry in a(n) hierarchical database has one parent node, with the parent node having several child nodes.
A hierarchical database model is a data model where the data is organized into a tree like structure. The data is stored as records and these are connected to one another through links.
The same ligand can bind to different receptors causing different responses (e.g.. acetylcholine). On the other hand, different ligands binding to different receptors can produce the same cellular response (e.g. glucagon, epinephrine).
Doctor or a teacher. they both take care of people