stages of growth and development in animals
Describe the stages of growth and development in animals.(8marks)
Suggested resposponses
Cleavage; progressive mitotic division of the zygote in the geometric series;
Gastrulation; this is differentiation of the mass of cells like the morula into germ-layer-ectoderm,mesoderm and endodermis;
Organogenesis;formation of organs and organ systems from the germ layers;
Development of extra-embryonic structures; cells of the developing embryo and uterus forms extra embryonic structure or...
