A) The polar body is the egg cell which is then fertilized by the sperm cell. B) Far fewer eggs are produced by the female than sperm produced by the male. C) Meiosis I begins in the female fetus. D) Meiosis II is not completed until after the egg cell makes contact with the sperm cell.
What he was more interested in was the way in which fundamental concepts like the very idea of number, time, quantity, causality, justice and so on emerged. Piaget (1936) was the first psychologist to make a systematic study of cognitive development. His contributions include a stage theory of child cognitive development, detailed observational studies of cognition in children, and a series of simple but ingenious tests to reveal different cognitive abilities.
Psychologist Lev Vygotsky believed that childrenâs sociocultural environment plays an important role in how they develop cognitively. In Vygotskyâs view, the acquisition of language is a crucial part of cognitive development. After children acquire language, they donât just go through a set series of stages. Rather, their cognitive development depends on interactions with adults, cultural norms, and their environmental circumstances.