Gastrulation in frog involves:
A.Epiboly
B.Emboly
C.Invagination
D.All of these
Category: Embryo Genesis Mcqs
Gray crescent in frog’s egg marks the future:
A.Dorsal side of the embryo
B.Ventral side of the embryo
C.Latheral side of the embryo
D.Tail of the embryo
Animal pole in frog’s egg in water remains upwards because:
A.Sperms enter through it
B.It absorbs light
C.It is free from yolk
D.It makes egg invisible to enermies by absorbing light
Which of the following structures in our eye are not derived from ectoderm:
A.Lens, retina, cornea, and conjunctiva
B.Selerotic, choroids layer and pupil
C.Iris, ciliary body and eye muscles
D.Both of the structures in list (b) and (c)
1st cleavage in frog’s egg is:
A.Holoblastic and vertical
B.Holoblastic and transverse
C.Meroblastic and vertical
D.Meroblastic and transverse
Gestation period in human beings is:
A.10 weeks
B.20 weeks
C.30 weeks
D.40 weeks
Which of the following structures in frog is ectodermal in origin:
A.Epidermis
B.Skin glands
C.Dermis
D.All of these
Tadpole larva is stage in life history of frog which:
A.Grows inside the uterus of frog
B.Lives on land only
C.Is different in structure an behavious than adult frog
D.Resembles the adult frog
Trophoblast cells just above embryonal knob in mammalian blastocyst are called:
A.Cells of Ranvier
B.Cells of Rauber
C.Cells of Malpighi
D.None of these
A fully formed tadpole of frog does not contain:
A.Scales
B.Late al-line-organs
C.Gills
D.Horny Jaws
