D.it is surrounded by a cell membrane
Answer:
Option C
Explanation:
As per the Chargaff's Rule of Base Pairing, nucleotide base pairs are complementary to each other and the common formula of pairing is as follows –
A member of purine (Adenine and cytosine) group pairs with the member of pyrimidine (Thymine and guanine) group
Therefore, A always pairs with T and C pairs with G as they become structurally stable by forming hydrogen bonds
Thus, Option C is correct
Answer: The P wave indicates atrial depolarization. The P wave occurs when the sinus node, also known as the sinoatrial node, creates an action potential that depolarizes the atria. The P wave should be upright in lead II if the action potential is originating from the SA node.
Explanation:
Answer:
the average temperature of the lower atmosphere will gradually increase, a phenomenon known as the greenhouse effect.