Beginning of the formation of archenteron in the development of frog represents:
A.Early blatula stage
B.Neurula stage
C.Early gastrula stage
D.Late gastrula stage
Category: Embryo Genesis Mcqs
Gestation period in mammals is the period:
A.From evaluation to fertilization
B.From fertilization to cleavage
C.From conception to parturition
D.Of implantation of the embryo
Mammalian gastrula is different from frog’s gastrula in one of the following respects:
A.It is only-single layered
B.During its formation involution and invagination processes occur
C.Blastopore and archenterons are not formed
D.The archenterons is filled with fluid
The term cleavage refers to:
A.Cell divisions of zygote upto completion of blastula stage
B.Cell divisions of sperms mother cells upto formation of spermatozoa
C.Maturation of oogonium upto formation of 1st polar body
D.Maturation of spermatids to form spermatozoa
Gastrula is completed in about:
A.10 hours of oviposition
B.20 hours of oviposition
C.30 hours of oviposition
D.50 hours of oviposition
As a result of metabolism in the body of mammalian embryo:
A.No wastes are formed
B.Waste products are reabsorbed by embryo
C.Waste products accumulated eliminated at birth
D.Waste products are eliminated through mother’s body
Posterior side of future embryo of frog will be the side:
A.Of entrance point of sperm
B.Opposite to entrance point of sperm
C.Offgray crescent
D.Of animal pole
Total connective tissue present in our body is derived from:
A.Ectoderm of the embryo
B.Endoderm of the embryo
C.Mesoderm of the embryo
D.Ectoderm, endoderm and mesoderm
An intimate connection between the body of mother and embryo is called:
A.Placenta
B.Primitives streak
C.Hensen’s knot
D.None of these
The term development which means formation of body from a single called zygote includes which of the following processes:
A.Increase in cellular number by growth and divisions
B.Differentiation according to division of labour by genetic suppression
C.Arrangement of these parts into tissues, organs etc.
D.All of these
