Which of the following is the additional function of the embryonic?
a) respiration and storage of waste products
b) storage of waste products
c) reproduction and nourishment
d) respiration and reproduction
The transitory stage in between cleavage and gastrulation is………
a) blastula
b) organogenesis
c) gastrula
d) embryogenesis
Explanation: blastula, hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg.
During…….week,
the two layered embryonic disc transforms into a three-layered embryo.
a) first
b) second
c) third
d) sixth
Explanation: these primary germ layers are ectoderm, mesoderm and endoderm
The process of gastrulation completed during gestation at an age of ……….
a) 1st week
b) 2nd week
c) 3rd week
d) 4th week
The formation of three primary germ layers during embryonic development is called……..
a) gastrulation
b) morulation
c) fertilization
d) neurolation
Explanation: Gastrulation is the stage in the early embryonic development of most animals, during which the blastula, or in mammals the blastocyst is reorganized into a multilayered structure known as the gastrula.
How many layers are present in gastrula?
a) two
b) three
c) four
d) none of these
Explanation: ectoderm, mesoderm and endoderm
