Consider two e. coli mutants: mutant 1 has mutation in laci, such that the protein can no longer bind dna. mutant 2 has a mutation in the operator, such that laci can no longer bind to it. what will be the phenotype of these mutants? (assume there is no glucose present

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities