Because the majority of cell differentiation occurs during the EMBRYONIC phase, .................. The embryonic stage of pregnancy is the period after implantation during which all the important organs and structures in the growing fetus is formed. Tetratogens are factors that caused malformation of embryo. Exposure to tetratogens during embryonic stage cause most destructive damages.
Umbilicus or umbilical cord and im not sure about the name of the process!
Karyotype helps to study the presence and location of genes on chromosome. This also helps to find the mutations such as duplication or deletions.
The geometric method gives scientists the spreading direction to go with the spreading speed
Answer:Their inferences are based on evidence that they collect during their investigations. Readers learn that scientists gather and interpret evidence and draw conclusions based on this evidence. Some scientists investigate things that they cannot observe directly.
Explanation:
