Answer:
A) preoperational stage
Explanation:
The preoperational stage is the second stage in Piaget's theory of cognitive development. This stage begins around age 2, as children start to talk, and lasts until approximately age seven. During this stage, children begin to engage in symbolic play and learn to manipulate symbols.
(googles words, not mine)
Answer:
Hydra are simple freshwater animals, while Obelia lives in the sea or fresh water
Explanation:
The main difference is that Hydra's body shape is a polyp, while Obelia consist of polyps and medusae in its life cycle
Answer:
The correct answer is option a) "preload".
Explanation:
In cardiology, the concept of preload refers to the initial stretching of the cardiomyocytes to its greatest dimensions prior to contraction. This first stretching is achieved by a difference of pressure between the ventricles, which happens by the pump of an increased amount of blood in one of the ventricles. The result is that one ventricle has a greater dimension than the other, but the blood arrives to the other and causes to increase its stroke volume and match that of the other.
Explanation:
For most viral infections, treatments can only help with symptoms while you wait for your immune system to fight off the virus. Antibiotics do not work for viral infections. There are antiviral medicines to treat some viral infections. Vaccines can help prevent you from getting many viral diseases.