Terms : Hide Images
| 81562836 | direct development | where the newborn is born as as miniature adult and goes through minor sexual changes | |
| 81562837 | indirect development | the juvenile animals differs significantly from the adult | |
| 81562838 | yolk | a small amount of food reserve in an egg | |
| 81562839 | larva | sexually immature form of an animal | |
| 81562840 | metamorphosis | a revolutionary body form and then become sexually mature adults | |
| 81562841 | amniotic egg | fully terrestrial vertebrate life was not possible until the evolution of the shelled amniotic egg. this is where the embryo is protected in liquid a filled space and develops in there. | |
| 81562842 | cleavage | a series of mitotic divisions of the large fertilized egg cell or zygote | |
| 81562843 | morula | a solid ball of small cells divided down the middle creating 2 diploid halves | |
| 81562844 | blastula | a hollow structure with cells surrounding the outside and fluid on the inside | |
| 81562845 | blastopore | an indentation that forms on the outside of the blastula causing the next stage gastrula to form | |
| 81562846 | gastrulation | the cell migration and differentiation that produces a three-layered embryo and results into a gastrula | |
| 81562847 | organogenesis | gradually the ectoderm, mesoderm and endoderm rearrange themselves into the organs characteristic of the animal's species | |
| 81562848 | endoderm | cells of enlarging dimple, destined to become the digestive tract and associated organs | |
| 81562849 | ectoderm | the cells remaining on the outside, which will form the epidermis of the skin and the nervous system | |
| 81562850 | mesoderm | some cells migrate between the endoderm and ectoderm forming a third final layer | |
| 81562851 | development | the process by which an organism proceeds from fertilized egg through adulthood | |
| 81562852 | differentiation | the specialization of embryonic cells into different cell types such as muscle cells, brain cels and so on | |
| 81562853 | induction | the process by which specific cells are stimulated to follow a specific development path | |
| 81562854 | homeoboxes | short sequences of DNA found within larger genes |
