.Propagating a plant by cuttings will allow you to keep the special characteristics of that plant. Plants grown from seed will often be different from the parent plant and from each other. Propagating a new plant via cuttings avoids the difficulties of propagating by seed.
Disadvantages of propagating stem cuttings are: You will get a lack of genetic diversity and you may potentially increase Insect and Disease weakness in the new plant.
Hydrogen and Oxygen. Better known as H2O
Conditioned stimulus
Classical conditioning is a learning procedure in which a biologically potent stimulus paired with previously neutral stimulus. This pairing will cause a response that can be the same as the potent stimulus. This is done repeatedly for an organism to elicit a conditioned response to the previously neutral stimulus that was paired to the active stimulus. The dog salivates due to the idea that food is related to the sound of the bell.
The heart sounds are primarily produced when the valves (i.e. semilunar valves, tricuspid valve, mitral valve) close rather than the sound of the actual contraction. In the closure of the aortic semilunar valve, the second heart sound is produced or the S2; in contrast to the closure of the mitral and tricuspid valves which produce the first heart sound or S1. The S2 is ultimately related to the diastole which corresponds to the filling phase of the ventricles.
