What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation?

The preoperational stage is the second stage in Piaget's theory of cognitive development. Children begin to take part in symbolic play and learn to manipulate symbols throughout this stage. This stage begins around age 2, as children start to talk, and lasts until around age 7. The answer is that Piaget’s explain that Preschool children's tendency headed for centration avoids them from focusing on other applicable features of a situation.  

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.