Question: Which phrase defines a law?
A. a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable
B. A statement of fact that is generally accepted to be true and universal because it has always been observed to be true.
C. a hypothesis or group of related hypotheses that can be accepted as true based on repeated experimentation with similar results
Answer:
Correct answer: B). A statement of fact that is generally accepted to be true and universal because it has always been observed to be true.
Explanation:
A scientific law may be defined as the something that appears to be true and is universally applicable. Scientific laws do not explain why the observed events happen, but it only states that the event occurs in the same way over and over. Example of scientific law is a law of gravity. Gravity is always there and it always works in the same manner. Other examples include newton's law of motion, which states how the things move.
It can never be created or destoryed because it goes from form to form. For example electric energy helps start ovens that are electric, or chemical energy helps cars get into motion. Radiation energy helps give trees life, the sun helps give trees life.
Answer:
The answer is Norepinephrine.
Explanation:
Acetylcholine (Ach) and Norepinephrine (NE) are both chemical substances (neurotransmitters) released primarily by nerve cells and they affect different parts and systems of the body. Acetylcholine mostly targets the muscles and the brain and it is a part of the parasymphatetic nervous system whereas norepinephrine targets the whole body and has an effect that leads to the contraction of muscles and the increase of the heart rate. Norepinephrine is a part of the symphatetic nervous system.
Since the symphatetic nervous system is responsible for the crucial "fight-or-flight" response of our body, it has a more dramatic effect on the muscle contraction. Norepinephrine, being a part of the symphatetic nervous system, should result in a more drastic change in contractile force.
I hope this answer helps.
it is 3 THEY DO NOT CONTAIN CHROMOSOMES HOPE THIS HELPS
