Which of the following statements concerning childhood brain development is not true?
a. children seldom remember events that occurred before the age of three.
b. infants can make cause and effect associations before the age of three.
c. synaptic pruning occurs as the growth of fatty tissues around neurons increase.
d. myelination to speed up information processing during childhood.

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change