Animal pole in frog’s egg represents perspective:
A.Dorsal side
B.Head end
C.Tail end
D.Ventral side
Category: Embryo Genesis Mcqs
Foetal membranes are found in:
A.Cyclostomes, fishes and amphibians
B.Reptiles, birds and mammals
C.Both of the groups in (a) & (b)
D.None of these
All the digestive glands are formed in the vertebrates by:
A.Ectoderm only
B.Endoderm only
C.Mesoderm only
D.None of these
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
Gastrula is the stage of the embryonic development of frog in which:
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 tadpole of frog metamorphoses into adult after:
A.One week
B.Two weeks
C.Three week
D.Four weeks
Middorsal portion of gray crescent in frog’s blastula is:
A.Presumptive notochord
B.Presumptive neural tube
C.Presumptive ectoderm
D.None of these
The fertilization in mammalian ovum occurs:
A.Inside the body cavity
B.Inside the fallopian tube
C.Inside the uterus
D.Inside the vagina
Foetal part of mammalian placenta has:
A.Outermost layer of trophoblast only
B.Allantochorion only
C.Endothelia of capillaries of allantoic artery and vein
D.All of these structures
__________ observed a slice of cork:
A.Robert Hooke
B.Dicey A.H.
C.Robert Browne
D.None of these
