The process of formation of primary organ rudiment is called

During organogenesis hypomere mesoderm flanks theIntermediate

During gastrulation in frog the prospective nervous system mainly expand due to

In the Gastrula of frog which of the following layers line the roof of the archenteron and floor of the archenteron respectively

Gastrulation in Amphioxus occurs by a process of

Epiboly occurs in

In amphioxus gastrula achenteron is formed by the

The cavity formed during the process of gastrulation is called

The mass separation of cells from one another is called

In frog gastrula mesodermal cells remain separated from the notochordal cells by

Which of the following is called chordo-mesoderm

In gastrulation the movement of throwing in is known as

The term mesogenesis refers to the formation of

Yolk plug is found in the

In frog the gastrula is rotated to bring its antero-posterior axis in a

One of the following is not the type of emboly

In amphioxus gastrula circular rim is called

.Mesodermal cells are formed by

The organ that develops from ectoderm is

In amphioxus gastrula which tissue lies in the dorsal lip of blastopore

Which mesoderm flanks the neural tube and notochord

During organogenesis the splanchnic mesoderm lies next to the

In a developing embryo the nervous system is derived from the

When the micromeres divide rapidly and grow over the macromeres it is known as

The formation of brain and different sensory organs is called

Morphogenetic movements occur during

Which is the first indication of gastrulation in frog

One of the following is not a kind of tubulation

The rolling in of the superficial cells over the rim of the blastopore is called

Thyroid and anterior pituitary lobe are formed from the

During gastrulation in frog which is more active at the dorsal lip of blastopore

Pancreas is derived from the germinal layer of

During gastrulation which presumptive cells are found at the animal pole

In frog the lung and gills are developed from

The germinal layer from which the heart kidneys and spleen are formed is

During gastrulation ectoderm completely covers the whole embryo by

In frog gastrula the yolk plug is formed of

The organ which is produced from mesoderm after gastrulation in a frog is

Which one of the following is the mesodermal derivative

Heart and lymphatic system are formed from

Posterior lobe of pituitary is formed from the

The major system derived from the endoderm is