In frog, gastrulation process involves
epiboly
emboly
invagination
All of these
Select the correct statement.
Cleavage follows gastrulation
Yolk content in egg has no role in cleavage
Cleavage is repeated mitotic division of zygote
Gastrulation and blastulation are followed by each other
Anti-fertilizin is present on
Egg
Tail
Ovum
Spermatozoa
Which of the following is not correct for gastrulation ?
Archenteron is formed
All germinal layers are formed
Morphogenetic movements
Some blastomeres and blastocoel degenerate
During embryonic development, endoskeleton and muscles develop from which germinal layer?
Ectoderm
Endoderm
Mesoderm
Blastopore
In frog, chromosome number is reduced to half
When 2nd polar body is separated
When 2nd polar body is divided
When 3nd polar body is separated
When 1nd polar body is separated
Which of the following undergoes spermtogenesis?
Spermatids
Spermatogonia
Primary spermatocytes
Secondary spermatocytes
Which of the following structures are derivatives of the endoderm?
Alimentary canal and respiratory structures
Muscles and blood
Excretory and reproductive structures
Skin and nerve cord
Which is formed in gastrulation?
Archeenteron
Heart
Brain
None of these
Which of the following is correct?
Mesoderm - Brain
Ectoderm - Liver
Mesoderm - Skeleton
Endodermis - Epidermis
