Cleavage found in mesolecithal egg is
Holoblastic and equal
Holoblastic and unequal
Meroblastic
Discoidal
In frog, gastrulation process involves
epiboly
emboly
invagination
All of these
If the size of a fertilized egg of frog is compared with the size of its blastula and gastrula stages, which of the following observations will be correct ?
There is a progressive increase in size from zygote to blastula to gastrula ; '
All the three will be of the same size
Zygote will be smaller, while blastula and gastrula will be larger
Gastrula will be larger, while zygote and blastula will be of same size
Which of the following is correct?
Mesoderm - Brain
Ectoderm - Liver
Mesoderm - Skeleton
Endodermis - Epidermis
If a germ cell in a female gonad and a germ cell in a male gonad begin undergoing meiosis simultaneously, what will be the ratio of ova and sperms produced?
1:1
l : 2
1:4
2:1
Conversion of spermatids into sperm is
Spermiogenesis
Spermatogenesis
Gametogenesis
Metamorphosis
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 undergoes spermtogenesis?
Spermatids
Spermatogonia
Primary spermatocytes
Secondary spermatocytes
Anti-fertilizin is present on
Egg
Tail
Ovum
Spermatozoa
