1st cleavage in frog’s egg begins after:
A.2
B.4 hours of fertilization
C.6 hours of fertilization
D.8 hours of fertilization
A.2
B.4 hours of fertilization
C.6 hours of fertilization
D.8 hours of fertilization
A.The embryo has three primary germ layers
B.Embryo is a hollow ball of cells with a single cell thick wall
C.Embryo has ectoderm, endoderm and a blastopore
D.Embryo has ectoderm, endoderm and a rudimentary nervous system
A.One week
B.Two weeks
C.Three week
D.Four weeks
A.Presumptive notochord
B.Presumptive neural tube
C.Presumptive ectoderm
D.None of these
A.Inside the body cavity
B.Inside the fallopian tube
C.Inside the uterus
D.Inside the vagina
A.Outermost layer of trophoblast only
B.Allantochorion only
C.Endothelia of capillaries of allantoic artery and vein
D.All of these structures
A.Robert Hooke
B.Dicey A.H.
C.Robert Browne
D.None of these
A.Ectoderm, endoderm, blastopore and archenteron
B.Ectoderm, mesoderm, blastopore and archenteron
C.Ectoderm, endoderm, blastocoel and archenteron
D.Ectoderm, mesoderm, blastocoel and archenteron
A.1/2 month
B.1
C.2
D.3 – 4 months
A.Epiboly, invagination, cleavage
B.Involution, invagination, cleavage
C.Involution, epiboly, evagination
D.Involution, epiboly, invagination