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- a) Describe the process of neuralation. b) Identify the germ layer from which the nervous system forms. c) Describe when in development neuralation occurs. d) Identify a teratogen that could affect the development of the brain during this stage of pregnancy.Explain why teratogens are difficult to identify.Type answer with explanation and conclusion? Summarise the key developmental changes that occur from the point that the embryo is formed up to the end of the 1st trimester of pregnancy when the embryo is considered a foetus ?
- Describe the differences between spermatogenesis and oogenesis by filling out the following chart: Comparison Spermatogenesis Oogenesis Sex Capable of this Process Progenitor Cell involved Location of Process Continuity End Products (list all the final products and their quantity)What are the MAJOR categories of teratogens? a) Drugs and alcohol, radiation, poor nutrition b) Infection, environmental agents, drugs and alcohol C) Environmental agents, sexually transmitted diseases, poor nutrition d)Poor nutrition, chromosomal abnormalities, radiation e)Chromosomal abnormalities, drugs and alcohol, poor nutritionExplain the concept of Development of Gametes Varies in Spermatogenesis Compared to Oogenesis ?