Answer: I think C (I apologize if not)
Explanation: Oxygen and carbon dioxide travels to and from tiny air sacs in the lungs, through the walls of the capillaries, into the blood. Blood leaves the heart through the pulmonic valve, into the pulmonary artery, and to the lungs.
In the lungs, the blood refills its oxygen supply and gets rid of carbon dioxide. The oxygenated blood returns from the lungs to the left atrium through the pulmonary veins to the heart. The left ventricle then pumps this oxygen-rich blood throughout the body. Blood first enters the heart's right atrium. A muscle contraction forces the blood through the tricuspid valve into the right ventricle. When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery. Then it travels to the lungs.
Answer: Potassium-40 decays into argon gas over time.
Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.
Potassium-40 undergoes decay following first order kinetics as given below:
Im sure that it is Aa hopefully I'm right
Pyridostigmine is a acetylcholinesterase inhibitor which acts as a cholinergic drug. Acetylcholinesterase or AChE is the enzyme that breaks down the major neurotransmitter acetylcholine into acetyl-CoA and choline, rendering the neurotransmitter useless. In a patient that had major adverse effects upon administration of pyridostigmine, the correct drug to be given as antidote for a cholinergic drug is an anticholinergic drug such as atropine.
Answer:
A caldera
Explanation:
This forms when a volcano collapses in on itself.
Have a nice day and hope this helps.
