.Mesodermal cells are formed by
1.Involution
2.Invagination
3.Epiboly
4.Delamination
During gastrulation ectoderm completely covers the whole embryo by
1.Convergence
2.Involution
3.Invagination
4.Epiboly
During gastrulation in frog the prospective nervous system mainly expand due to
1.involution
2.Invagination
3.Epiboly
4.Delamination
During gastrulation in frog which is more active at the dorsal lip of blastopore
1.Epiboly
2.Invagination
3.Involution
4.Delamination
During gastrulation which presumptive cells are found at the animal pole
1.Epidermis
2.Nervous system
3.Notochord
4.Both 1 and 2
During organogenesis hypomere mesoderm flanks theIntermediate
1.Gut region
2.Neural tube
3.Notochord
4.Intermediate
During organogenesis the splanchnic mesoderm lies next to the
1.Ectoderm
2.Gut epithelium
3.Notochord
4.Gut endoderm
Epiboly occurs in
1.Cleavage
2.Oogenesis
3.Gastrulation
4.Organogenesis
Gastrulation in Amphioxus occurs by a process of
1.Hyperboly
2.Hypoboly
3.Delamination
4.Invagination
Heart and lymphatic system are formed from
1.Endoderm
2.Mesoderm
3.Ectoderm
4.Blastoderm
In a developing embryo the nervous system is derived from the
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Blastoderm
In amphioxus gastrula achenteron is formed by the
1.Involution
2.Invagination
3.Delamination
4.Convergence
In amphioxus gastrula circular rim is called
1.Blastopore
2.Blastocoel
3.Archenteron
4.Lip of blastopore
In amphioxus gastrula which tissue lies in the dorsal lip of blastopore
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Notochord
In frog gastrula mesodermal cells remain separated from the notochordal cells by
1.Convergence
2.Delamination
3.Involution
4.Invagination
In frog gastrula the yolk plug is formed of
1.Yolk-free micromeres
2.Yolk-laden micromeres
3.Yolk-free macromeres
4.Yolk-laden macromeres
In frog the gastrula is rotated to bring its antero-posterior axis in a
1.Horizontal plane
2.Longitudinal plane
3.Latitudinal plane
4.Vertical plane
In frog the lung and gills are developed from
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Endometrium
In gastrulation the movement of throwing in is known as
1.Epiboly
2.Emboly
3.Hypoboly
4.Hyperboly
In the Gastrula of frog which of the following layers line the roof of the archenteron and floor of the archenteron respectively
1.Mesoderm Endoderm
2.Endoderm Mesoderm
3.Ectoderm Mesoderm
4.Mesoderm Ectoderm
Morphogenetic movements occur during
1.Cleavage
2.Blastulation
3.Fertilization
4.Gastrulation
One of the following is not a kind of tubulation
1.Neurogenesis
2.Notogenesis
3.Mesogenesis
4.Metagenesis
One of the following is not the type of emboly
1.Involution
2.Delamination
3.Epiboly
4.Invagination
Pancreas is derived from the germinal layer of
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Chorda-Mesoderm
Posterior lobe of pituitary is formed from the
1.Endoderm
2.Mesoderm
3.Endoderm
4.Blastoderm
The cavity formed during the process of gastrulation is called
1.Blastocoel
2.Archenteron
3.Sub-germinal cavity
4.Blastoderm
The formation of brain and different sensory organs is called
1.Metagenesis
2.Neurogenesis
3.Notogenesis
4.Mesogenesis
The germinal layer from which the heart kidneys and spleen are formed is
1.Ectoderm
2.Endoderm
3.Mesoderm
4.Hypoderm
The major system derived from the endoderm is
1.Nervous system
2.Lymphatic system
3.Muscular system
4.Digestive system
The mass separation of cells from one another is called
1.Epiboly
2.Invagination
3.Involution
4.Delamination
The organ that develops from ectoderm is
1.Pancreas
2.Spleen
3.Kidney
4.Eye
The organ which is produced from mesoderm after gastrulation in a frog is
1.Liver
2.Heart
3.Tongue
4.Pancreas
The process of formation of primary organ rudiment is called
1.Tubulation
2.Neurulation
3.Elongation
4.Organogenesis
The rolling in of the superficial cells over the rim of the blastopore is called
1.Invagination
2.Involution
3.Delamination
4.Epiboly
The term mesogenesis refers to the formation of
1.Notochord only
2.Mesoderm only
3.Notochord and mesoderm
4.Notochord and nerve cord
Thyroid and anterior pituitary lobe are formed from the
1.Blastoderm
2.Mesoderm
3.Endoderm
4.Ectoderm
When the micromeres divide rapidly and grow over the macromeres it is known as
1.Epiboly
2.Involution
3.Delamination
4.Gastrulation
Which is the first indication of gastrulation in frog
1.Formation of germ ring
2.Formation of gery crescent
3.Formation of germ layers
4.Formation of archenteron
Which mesoderm flanks the neural tube and notochord
1.Epimere
2.Mesomere
3.Hypomere
4.Metamere
Which of the following is called chordo-mesoderm
1.Notochord and mesoderm
2.Notochord and endoderm
3.Ectoderm and mesoderm
4.Notochord and ectoderm
Which one of the following is the mesodermal derivative
1.Pigment cells
2.Pancreas
3.Liver
4.Kidney
Yolk plug is found in the
1.Blastula of amphioxus
2.Gastula of amphioxus
3.Blastula of frog
4.Gastrula of frog