#Question id: 5550
#5. Developmental Biology
The vertebrate nervous system is derived from
#Question id: 5551
#5. Developmental Biology
When the vertebrate embryo grows into a hollow ball, it is called a
#Question id: 5552
#5. Developmental Biology
Soon after gastrulation, dorsal ectodermal cells condense and form a tube called the _______________ tube.
#Question id: 5553
#5. Developmental Biology
The notochord is a ___ structure in vertebrate embryos that lies under the ___, and is bordered by ___.
#Question id: 5554
#5. Developmental Biology
Even in the absence of sperm, metabolic activity in an egg can be artificially activated by ________.
#Question id: 5555
#5. Developmental Biology
The formation of the fertilization envelope requires an increase in the cytosolic concentration of ________.